• My journey back to large format.

    This post as the title suggests is about my return to large format photography.

    First a little background information to set the scene.

    When I first started in professional photography more than a good few years ago! I was introduced to the world of large format photography in the form of the MPP 5×4 Micro Technical camera – it was a solid piece of kit. As well as a ground glass rear focusing screen the camera was equipped with a range finder focusing capability, although this only worked properly if the correct cam linkages were fitted for the relevant lenses.

    Whilst I was at college I had access to a Sinar monorail camera, this in turn had a greater amount of lens and film plane movements available to it due to the design.

    Fast forward to the early 21st Century.

    Having over the years changed employer several times and finally set up a retouching studio within the offices of Protech Repairs, I was in conversation with Kelvin from Protech about the joys of large format photography. This in turn got me thinking about making a return to large format photography.

    Initially I considered the idea of making a 5×4 camera from scratch, but this was soon decided against due to the cost of the component parts – focus bellows, making a focusing rack, film back and of course material to make the camera body. Enter that well known auction site eBay. I was browsing on day when I came across a gentleman selling a almost complete homemade 5×4 camera, minus lens. I bought it, having worked out that it would be a lot less expensive for me to finish building the camera myself.

    Views of underside of camera – note how well engineered it is.

                           Underside view                                                     Side view                                                            Rear view

    Once I got the camera I set about making some changes – firstly I reduced the size of the camera body (it was constructed from aluminium), this involved dismantling the camera body which was beautifully drilled and bolted together and cutting the framework down to about half the initial length. The next step was to make some changes to how the focusing rack assembly was fixed to the camera body, as you can see by the photograph there was a lot of aluminium used! My original plan was to attempt to make an adjustable rail assembly, although it worked in a fashion it was not wholly ideal. Several attempts later a fixed arrangement was decided on. Following on from this I constructed a pan and tilt/rise and fall lens mechanism, for this I used a camera flash bracket bolted onto the focus rail and the lens panel. Finally came the most challenging part; the building of the film back – this consisted of a focusing screen and dark slide holder. The film back was required to rotate through 90 degrees to enable both vertical and horizontal photographs to be taken and at the same time the screen had to move backwards to enable the dark slide to sit in the focus plane to take the photograph.

    As chance would have it I had an old studio camera in my loft that had such an assembly on it, this was used as a donor to make the 5×4 film back, whilst it worked in a basic way, there were subsequent problems with keeping the dark slide in place whilst taking a photograph (the dark slide would sometimes slip out of position causing an alignment issue and on occasion fogging).

    Early focus rail support and film back

    The lens board was of a unique size and whilst one came with the camera, extra ones were needed for additional lenses. I made several boards including a recessed board for use with a wide angle lens from thin plywood and heavyweight card – these in turn were sprayed matt black to prevent reflections.

    A completely redesigned film back was created to prevent dark slide alignment problems and this has proved to be very satisfactory.

                                                                                                      Final focus rail design and redesigned film back

    The camera is not without flaws these primarily – the weight, it weighs in at 3 kilos, (quite a chunk to carry around for a day) and in addition the lack of compactability – the focus rack not folding up as the MPP camera does, makes quite cumbersome. On the plus side the camera is very solid in construction.

    Subsequently I have purchased an Intrepid mk4 camera, this is quite considerably lighter since it is primarily constructed from marine ply, it also folds down thus taking up a lot less space. The Intrepid is not without a few flaws, although most of these have been rectified either by me or Intrepid Cameras thanks to their lifetime guarantee.

    Intrepid Mk4  5×4 camera

    This may sound as though I have given up on my original camera, although I have not. I still use it on occasion and I still have further ideas on how to make it lighter and more compact, it’s just a matter of finding the time!

    Processing 5×4 sheet film

    I originally processed my sheet film in a standard Patterson 120 sized film processing tank using what is called the ‘Tapas Method’ – this entails curving the film with emulsion side inward and securing with an elastic band, using this method 4 sheets of film can be processed at one time. If using this method remember to still use the centre column that normally supports the processing reel otherwise the film will be fogged. I have now moved on and use MOD54  processing reels for sheet film, these however require a larger processing tank to be used but I can process 6 sheets of film at once.

            Single sheet – Tapas Method                4 sheets in processing tank – Tapas Method                   Patterson tank with MOD54 film holder

     

    Why do I enjoy large format photography?

    The reason I enjoy taking large format photgraphy is because, it makes one slow down and consider the view and composition of the photograph before making the exposure rather than taking a bunch of frames on a digital camera and later editing them down to the best frame, this in turn leads to taking more meaningful photographs due to the constraint of how many photographs can be taken in on session rather than what has euphemistically become known as ‘spray and pray’ with digital. Add to this the ability to control the plane of focus combined with perspective control, all this and amount of detail that can be captured on a large sheet of film, sheer bliss!

    Sample photographs

     

    I should like to extend my thanks to the following people without whom this article would not have happened:

    George P King Ltd – My first employer who introduced me to large format photography.
    Cliff for making the original camera in this article.
    Mark for his encouragement and badgering to get the project finished.
    My wife Sara who puts up with me lugging bags of camera kit around when we go out for the day
    Kelvin and Jo at Protech Repairs for the generous supply of donor material and encouragement to ensure the project did actually get finished.

     

     

     

  • Making a panoramic roll film camera

    The camera mentioned in the title came about as the result of a comment made to me by a good friend of mine.

    It all started when I was directed to the fact that a local large format camera maker was producing what could only be described as a half dark slide for 5×4 film dark slides. The concept enables the user to take 2 images approximately 6×12 cm on a single sheet of film.

    I took a look at the item and it got me thinking. I could see a couple of issues, firstly keeping track of which position the half slide was in when making an exposure, secondly taking care when taking both 6×12 cm and full 5×4 inch images in the same session, thirdly the cost of half a dark slide and finally the availability of 5×4 film.

    Whilst I like the 6×12 format, I felt that there must be an alternative. Since I already have 2  pinhole cameras that make images in the 6×12 format an idea started to emerge. How about building a camera and using a large format lens that I already own? Another point worth mentioning is that a manufactured 6×12 camera of any quality comes with a hefty price tag, so a homemade camera made a lot of sense if it could be built inexpensively.

    A short while after, the idea still floating around in my head, I happened to be in our local branch of The Works with my wife, I spotted a large plywood box that had been discounted due to a minor fault and voila! The basis for a 6×12 film camera.

    Using my Noon 6×12 pinhole camera as the inspiration and basic template for the new camera, I set about making the main body of the camera – this involved cutting the newly acquired wooden box approximately in half and reusing a section for the top plate and create a solid rectangular body.

    Perhaps I should mention at this point that I rarely commit measurements and drawings to paper, I tend to work it out in my head then start work! This is what is commonly called ‘My rule of ish’

    Having previously fitted the lens I intended to use to my 5×4 camera body and set the focus to infinity I measured the overall depth that was required for the new camera to enable the lens to be focused at infinity.

    The next stage was to create the film chamber, (this was made from a surplus picture frame), I used backing paper paper from a used 120 roll film ascertain the dimensions of the film guide, I wanted it as wide as possible whilst still supporting the film. Every surface of the film plane had to be perfectly flat and smooth to ensure the film emulsion did not get damaged when being moved across it, the outer edges were curved down to again prevent damage to the film emulsion.

     

    The film chamber and winder assembly

     

    After this the back of the camera was assembled, I decided to make it so that it fitted inside the main body of the camera to prevent light from leaking onto the film inside. A film pressure plate was then made to hold the film flat in the film chamber and against the film mask.

    Next came the tricky part, that of making sure the lens was focused at infinity at the film plane. This entailed cutting a hole in the front of the camera body for the lens to be placed over and fixing a focusing screen in the film chamber on the actual film plane, then it was outside with a dark cloth and a ruler to verify the distance the lens had to be placed at. – Back to The Works for another much smaller box!

    I intended to use a 90mm Schneider Angulon lens and as this had already been fitted to a lens panel and already included an additional modification I wanted to keep the lens on the panel to enable me to also use it on my 5×4 camera without having to reassemble the modification each time, so having obtained another plywood box I set about reshaping the front to hold the lens panel whilst still making it possible to remove easily when required – the design of it similar to that used on other large format cameras.

    Before I could put a roll of film through the camera a very important step – Make a film transport assembly.  The idea was to have  fixed locating pegs on the of the film chamber an a winder assembly at the top. I found some bolts of the correct size to locate inside the film spool to hold it in place for the bottom and for the winders I cut ground down some longer bolts to make them thinner and shorter. The winder bolts had a slot cut in them, into which a small flat section of metal would be wedged. Before this; winder knobs were made from a small section of broom handle, a hole drilled through the centre for the bolt to fit, in turn a small hole was drilled through the knob and bolt into which a small pin was forced to enable them to turn as one. Parallel holes were drilled top and bottom on both sides of the camera body into which the bolts were fitted. Packing blocks were fitted inside the camera at the bottom to hold the film spool in the correct position, at the top the bolts were pushed through a short section of spring was added then a tap washer pushed over the bolt to keep the spring in place and finally flat sections of metal were wedged in – the purpose of these are to locate in the top of the film spool to enable the film to be advanced. At this point I also added a tripod bush fitted into a piece of 5mm ply to the underside of the camera.

    The next stage was to use a 120 film backing roll to create the start point ie. frame 1 marked on the backing paper (note that 6×6 and 6×12 framing uses the central numbers on the film roll) was calculated and a hole drilled through the camera back and pressure plate, a section of red film was sandwiched between the back plate and the pressure plate to enable the film numbers to be seen when advancing the film.

    Having glued and secured all parts of the camera body together, it was time to dust out the interior and give the insides of the camera a coat of matt black paint to reduce risk of internal reflections.

    At this point I should mention that to produce 6×12 images the film is advanced to uneven numbers to obtain the correct spacing, ie 1,3,5 etc.

    Time to load the camera and take some test photographs.

    The first images were not good, apart from a miscalculation of frame spacing there was a large amount of overall fogging present. This was going to require a little more work!

    Frame spacing was easily solved by adjusting the frame start point – a new hole was drilled to more accurately observe the frame numbers on the backing paper.

    I deduced that the fogging was caused by the use of thin ply on the front of the camera – since the internals of the camera were now fixed in place, the solution was to cover the outside of the camera body with adhesive aluminum foil, not pretty since my initial idea had been to have a dark wood exterior on the camera but at least it was now light tight.

     

    Lightproof aluminum foil applied to front

     

    The second test roll of film showed a lot more promise, no overall fogging but there was a light leak causing a streak across the top of the image including what should have been the unexposed edge of the film.

    At this point I added extra light absorbing baffles inside the camera plus some thin light seal foam around the camera back. Up until this point the camera back had been held in place with a couple of elastic bands.

    Time for a third test roll, this time success! Time for some tidying up. The camera body and back was covered with a matt black adhesive plastic purchased at a bargain price from a local supermarket, 2 small brass finish clips were fastened to the backplate and camera body – no more rubber bands!

    The matt black finish

     

    Testing now complete – Time to apply the final finish in the form of a wood veneer to enhance the overall appearance of the camera, lens panel and back panel were given a matt black detail finish. The veneer was stained to enhance the grain and given 2 coats of wax polish to help waterproof the camera body.

    The final wooden finish

    Rear of camera with frame count viewer

    Top view – winder surround detail added

    Sample images

    All sample photographs were taken on Kodak Tri X film and processed in 510 Pyro developer.

     

     

    Conclusion

    This has certainly been an interesting experience. If I were to make another panoramic style roll film camera and yes I am considering it! Maybe even a 6×17 format camera, I would make the front of the camera of thicker material and lightproof the interior of the camera rather than the outside that way I could have a polished wood exterior from the outset. In addition to this I would also permanently fit a lens to the camera rather than make it removable.

    Watch this space!

     

     

     

     

  • STC Pure Hybrid CPL Filter

    STC recently announced the release of a revision of their well known Hybrid CPL (Circular Polarising) Filter.

    What is the difference between the ‘New’ Pure CPL Hybrid filter and its predecessor? According to STC the new filter has a more neutral colour balance.

    I have used the original STC Hybrid CPL filter for some years now, so was interested to see the difference between the two filters for myself. As a result I obtained a STC Pure Hybrid CPL filter and put it to the test.

    What makes the STC Pure Hybrid CPL filter special?

    Made with Schott B270 super tough glass, has a double sided anti reflection, antistatic, oil and waterproof coating, the filter edge is black rimmed to reduce reflection from the edges of the filter, the filter rings are Teflon coated to ensure smooth rotation in addition to this a special polarising film is used . All in all this makes for an ultra light and ultra slim polarising filter which also cuts UV light.

    Being a Hybrid filter it cuts light transmission by only 1/2 a stop whilst giving a 70% polarising effect.

    The filter is supplied in a square hard plastic padded case, also included are a high quality lens cleaning cloth, a UV test card (to prove how much UV light the filter blocks) and a certificate of accreditation– STC filters are individually numbered, this identifies the filter when registering to activate the guarantee.

    How the filter was tested.

    For comparison purposes both the STC Hybrid CPL and STC Pure Hybrid CPL were fitted to a Nikkor 24-85mm f4.5 – f5.6 AFG lens on a Nikon D800 camera body. The combination was mounted on a tripod, using a remote shutter release. Exposures were made in Aperture Priority, using an aperture of f11, metering was set to Matrix, 100 ISO, Neutral saturation and Daylight balance, files were saved as NEF and converted to Jpeg for website use in Adobe Camera Raw without adjustment.

    The NEF files were examined at 100% in Photoshop on a colour calibrated monitor.

    Making the test images

    Exposures were made without filter and at full polarisation. The filter ring was rotated several times on both filters to ensure that the full polarisation effect was used..The Teflon coated filter rings made rotation smooth with just the right amount of resistance.

    When using full polarisation underexposing by 1/2 a stop sometimes helps compensate for the darker blue sky causing the camera to overexpose.

    All photographs were taken in full sun from between 11.00 and 4.00

    Test Images

                                                                                                                           Colour saturation

    Without filter                                                 Original Hybrid CPL filter                                       Pure Hybrid CPL filter

     

    Notice the difference in the RGB channels in the example screen shots below

                                                                                                                                  Without filter

    Original Hybrid CPL filter

    Pure Hybrid CPL filter

    Without filter                                           Original Hybrid CPL filter                                       Pure Hybrid CPL filter

     

                                                                                                                                  Polarisation

    Without filter                                             Original Hybrid CPL filter                                       Pure Hybrid CPL filter

     

    Without polarisation                                                                                                      Polarised with Pure Hybrid CPL Filter

     

    Without polarisation                                                                                                      Polarised with Pure Hybrid CPL Filter

     

    Colour difference between filters

     Left –  Original Hybrid CPL filter colour balance                                                          Right – Pure Hybrid CPL filter colour balance

     

    Results

    As can be seen by the above screen shots the colour rendition between ‘Without filter and Pure Hybrid CPL filter’ are quite evenly matched and more neutral, whereas the original Hybrid CPL filter shows a slight cyan cast. Sharpness with or without  either of the two Hybrid CPL filters is unaffected, nor is there any  evidence of fringing thanks to the ultra slim high quality Schott glass and multi coating used. The Pure filter also makes a very good job of blocking UV light – see the examples below for further proof.

     

                                                                                                STC Ultra layer UV filter                 STC Pure Hybrid CPL filter

     

    STC Ultra layer UV filter                 STC Pure Hybrid CPL filter

    Conclusions

    When viewed on screen photographs taken using the Pure Hybrid CPL filter are clearly neutral, combined with only a 1/2 a stop light loss, excellent polarisation properties and being ultra slim profile and light in weight, add to this the fact that the filter is excellent at blocking UV light – this new version of Hybrid CPL filter ticks all the boxes.

    I keep a STC Hybrid CPL filter on my camera lens most of the time, the minimal light loss is hardly worth bothering about, plus it has the advantage that I have instant access to a polarising filter should the need arise.

    This filter is a premium product so expect to pay around £138 for a 77mm Pure Hybrid CPL filter.

    Would I recommend the Pure Hybrid CPL Filter?

    Short answer -Yes!  The STC Pure Hybrid CPL filter will be my main filter from now on.

    Extra Sample Images

    STC Pure Hybrid CPL filter

     

    Combination of STC Pure Hybrid CPL filter and STC ND 1000 clip filter

     

    Thanks go to STC and their UK distributor InfinityX for supplying the new Pure Hybrid CPL filter for the purposes of this review.

    As an extra incentive to purchase a Pure Hybrid CPL filter (or any other STC filter) there is a special 10% discount to be had when you add the discount code: 2023tpfp10off at the checkout through the link below.

    https://www.stcoptics.com/discount/2023tpfp10off

  • STC Infra Red Clip Filters

    The sun has now started to appear on a near daily basis now. That can mean only one thing!

    Time to break out the Infra Red filters!

    I should start by thanking our good friends William and Ashley at STC Optics for kindly providing the filters used in this review and  Protech Repairs for converting the Fuji X-E1 to a full spectrum pass filter.

    In this review I will be testing 4 STC clip filters – 3 Infra Red pass filters consisting of: 590nm, 720nm and 850nm, in addition to this I will be testing a 650nm UV/IR cut filter.

    The frames of  STC clip filters are made from black anodised 304 stainless steel which is virtually non magnetic, the glass itself is a mere 0.5mm thick and has a special nano coating to prevent dust from sticking to it.

    First the basics – Infra Red pass filters allow the transmission of infra red light at varying wave lengths – the higher the number the less visible light is allowed through. A UV/IR cut filter on the other hand cuts out both UV and Infra red wave lengths – in the case of the STC clip filter, it absorbs UV light from 650nm. When fitted to a full spectrum pass converted camera and set to daylight balance it effectively becomes a regular camera suitable for general photography once more. (I used this particular set up when on holiday this year to reduce the number of cameras carried.)

    How to use the clip filters with a Fuji mirrorless camera.

    When using infra red filters of any kind the camera must first be adapted for use with infra red filters – this usually involves having the hot filter (this blocks infra red light) removed and replaced with a full spectrum glass. Warning – do not attempt do do this yourself, if something goes wrong you could be left with a very expensive paperweight! Contact a reputable company to undertake the process. – See link at bottom for my personal recommendation.

    Installing the filter

    When using the clip filters for a Fuji mirrorless system for the first time, be aware that on the reverse side of the filter the two outer edges have a sticky layer, this is revealed by removing the clear cover layer.

    Remove the camera lens and place the filter into the throat of the camera, ensuring the lettering on the filter is facing outwards –  most of the STC clip filters will only fit one way up with the exception of the Fuji filter , this will fit upside down, but with lettering outward. Very gently press the outer edges of the filter to ensure the sticky layer make contact, replace the lens.

     

    Inserting clip filter                                                                                                          Clip filter in position

     

    Before taking a photograph a custom white balance must be made. This is done by first setting the camera to ‘Custom White Balance’, (the exact method of making a custom white balance vary with each camera model, consult your camera manual for further guidance.) Typically a 590nm balance is created using a white sheet of paper, for 720nm and upwards the white balance is done using green foliage as the neutral point.

    The setup

    For this review I used a full spectrum converted Fuji X-E1 plus a conventional Fuji X-T1 as a bench mark for daylight colour balance. Two lenses were used – the lake images were taken using a Meike 12mm f2.8 manual focus lens, the broken wall images were taken with a Andoer 35mm f1.8 manual focus lens. Custom white balances were made and set prior to taking the photographs, lenses were stopped down to f8, shutter speed set to Auto and sensitivity was 200 ISO. In both sets of tests the camera used was fitted to a tripod. All images were saved as Jpeg fine, large and 3:2 ratio. Focus confirmed prior to exposure. Lighting conditions were bright and sunny. It is worth remembering that Infra red light focuses at a different point to the visible spectrum, so ignore the fact that when focusing the point at which infinity is sharp will not align with the infinity mark on your camera.

     

    Test images

    The Lake photographs are shown in ACR (Adobe Camera Raw) to illustrate the wavelengths of light each filter passes.

     

    590nm pass filter

    720nm pass filter

    850nm pass filter

    Converted Camera set to Daylight balance – No filter

    UV/IR Cut Filter – Camera set to Daylight balance

    Unconverted Camera set to Daylight balance – No filter

     

    Wall and doorway

    590nm pass filter

    720nm pass filter

    850nm pass filter

    UV/IR Cut Filter – Camera set to Daylight balance

    Unconverted Camera set to Daylight balance – No filter

     

    Additional Sample Images

                                       850nm Pass filter – Image converted to Black and White                                                 850nm filter – No Adjustment

     

    UV/IR Cut filter in converted camera – Daylight Balance                                             UV/IR Cut filter in converted camera – Daylight Balance

     

    Conclusions

    All the photographs were opened and examined at 100% in Adobe CC on a colour profiled monitor, no alterations were made, the images are just as they came from the camera. The images were observed to be sharp from edge to edge and free from distortion and fringing.

    The photographs taken with display more detail in the shadow areas compared with the full colour images, it is worth noting that there is a colour balance difference between the images taken with the UV/IR Cut filter and the unconverted camera, this could be down to the amount of UV/IR being blocked by the clip filter compared with a lens without a UV filter and also the variance between the sensor arrangement of the two cameras used, in saying that either of the colour images is perfectly acceptable when viewed on its own.

    The all important question is. Do the STC clip filters offer value for money? For a Fuji X series APS-C  prices range from £96.99 for a single STC clip filter infra red filter (including case) to £111.99 for the UV IR Cut filter.

    Whilst this might appear expensive at first glance, consider the cost of purchasing a filter for each lens you wished to use and in the case of ultra wide angle lenses that have a protruding front element fitting a filter is not possible.

    Taking all this into account, the STC clip filter range offer excellent quality and great value for money. I own a number of STC clip and screw-in filters and would not be without them.

    STC are unique in the range of clip filters that they offer, fitting cameras from Nikon Z series to Pentax APS-C and most cameras in between.

     

    Update : STC Optics are offering readers of this blog a special discount on all their filters. Use the link below and add the discount code: 2023tpfp10off at the checkout.
    Filters can be purchased direct from STC Optics

    For further information on Infra Red conversions contact Protech Repairs

  • Back to Basics

    Have you ever noticed on TV and films how often a photograph is portrayed as being taken with an incorrect lens – amazing close ups from an impossible distance with a standard lens? Or how about the well lit photograph taken in near zero light?  Or how about one of my pet gripes holding the camera completely wrong? (I often see the last one when out and about.)

    I cannot do much about the first two items, but I can give some advice on this post about the last one.

    Part one – Holding the camera correctly.

    Do not grip the camera by the sides with both hands, this makes the camera unstable. Instead, hold your camera with your right hand by the grip on the right side (most cameras have a molded grip) place your left hand under the lens and tuck your elbows in to your chest, this forms a triangle which makes the camera a lot more stable and less prone to camera shake.

                                                     Incorrect grip                                                                                                      Correct grip

     

    Part two – Focusing correctly.

    When focusing or zooming a lens do not hold the lens on the top of the focus or zoom ring – this again makes the camera unstable due to the possibility of applying downward pressure. As with the correct holding position make your adjustments from the underside of the lens, this again in forming a triangle makes for a more stable arrangement.

    Incorrect method of  focusing                                                                          Correct method of focusing

     

    Although the illustrations in this post show the use of a film camera, the same principles apply to digital SLR cameras. If you have a viewfinder use it, on a tripod the rear screen can be used. I have seen more than a few people using the rear screen whilst hand holding the camera, not an easy thing to do! ( It is not a mobile phone!) This can once again lead to camera shake. In camera / lens stabilisation can correct for camera shake, it is designed as an aid to producing sharp photographs. However, good technique is better than relying on technology to correct for bad practices.

    Gripe over! I hope this post offers some guidance.

     

  • A Tale of Two TLRs

    What follows is a test of two TLR (Twin Lens Reflex) cameras, but first a little background information.

    I already own 2 TLR’s. – When one started to have problems with the shutter mechanism I switched to my second camera and soon after it too was having shutter problems, knowing that it might be difficult to get either repaired due to parts no longer being available I started looking out for a replacement. I found a Chinese made Seagull WWSC for sale at a very reasonable price, so I purchased it. Then a couple of weeks later I was browsing a local junk shop when I spotted in the corner of a display cabinet another TLR make and model not clear, I asked to take a look, it turned out to be an early Yashica C. The camera was very reasonably priced and the shutter appeared to be working ok, so I purchased it. I did not feel it was fair to leave it laying forlorn in the cabinet any longer – that is my excuse and I am sticking to it!

    The obvious question is. What do you do when you have 2 new (to you) TLR cameras? The answer is to take them out for a side by side test!

    For the purpose of the test both cameras were loaded with Rollei RPX 400 black and white film, all exposures were measured using a Lunasix light meter, apertures were set identically on both cameras and shutter speeds set accordingly. Both cameras were tripod mounted to eliminate the chance of camera shake and to enable identical photographs to be taken.

    Specification

                                                         Seagull WWSC                                                                                                         Yashica C

    Year of manufacture            Approx 1996                                                                                                              1956

    Film format                              120 roll film                                                                                                              120 roll film

    Number of exposures         12 – 6×6 frames                                                                                                         12 – 6×6 frames

    Film advance                          Lever wind                                                                                                                  Wind wheel with safety button

    Viewing lens                          Haiou 75mm f2.8 – 3 elements in 3 groups                                                          Yashikor 80mm f3.5  – 3 elements in 3 groups

    Taking lens                            Haiou 75mm f3.5 –  3 elements in 3 groups                                                          Yashikor 80mm f3.5  – 3 elements in 3 groups

    Focus range                          1 metre to infinity                                                                                                       1 metre to infinity

    Shutter                                Between lens leaf shutter – B, 1 to 1/300th second                                                 Between lens leaf shutter – B, 1 to 1/300th second

    Shutter  actuation           Auto cocked via film advance                                                                                     Shutter cocked via separate lever

    Focus                                 Flip up hood with magnifier, ground glass screen with fresnel split                    Flip up hood with magnifier and ground glass screen

    Focus mechanism           Front standard focus via wheel                                                                                   Front standard focus via wheel

    Flash Synch                      At all shutter speeds/X +M / PC socket                                                                       At all shutter speeds/X +M / PC socket

     

    Loading the cameras

    The Seagull and Yashica cameras are both loaded the same way – that is that the unexposed film is placed in the lower chamber, the leader is fed onto an empty film spool in the upper chamber, the film is then advanced until the start indicator on the film lines up with the two dots on the back of the camera (see photo). The film back is now closed and locked with the wheel on the base of the camera and now the film is advanced via the wind crank in the case of the Seagull and the wheel in the case of the Yashica C. Reversing the Seagull’s crank lever cocks the camera shutter, the Yashica C shutter is set with a small lever around the lens – with the Yashica it is essential to set the shutter speed prior to cocking the shutter.

    Film start markers

    The cameras in use

    Both cameras a similar in operation – they have a pop up hoods with spring loaded magnifier to aid focus, the magnifier is utilised by pressing the centre of the hood, the magnifier then unlatches and flips up so it is above the focussing screen, once you have done with it just press it back into the hood where it will lock back into place. The Seagull has its focus wheel on the left side of the body, whilst the Yashica focus wheel is located on the right hand side. Aperture settings are adjusted via a lever and in both cases the range goes from f3.5 through to f22. Shutter speeds are likewise changed with a lever on the opposite side to the aperture scale, whilst the Seagull shutter speeds are from B, 1 ½, ¼, 1/8, 1/16, 1/30, 1/30, 1/60, 1/125 and 1/300, the Yashica having an older generation Copal shutter its speeds range from B, 1, ½, 1/5, 1/10, 1/25, 1/50, 1/100 and 1/300. Since most negative film has a degree of latitude the variation between the cameras is not an issue, it may however cause a problem with less tolerant transparency film.

    For those wishing to use a lens hood or filter, it is worth noting that the Seagull has a screw thread mount of 34mm, whilst the Yashica uses a more common mount found most other TLRs that being a Bayonet 1 mount.

    I noticed that focusing with the Seagull is a little easier due to the split prism centre spot in the focusing screen, but at the same time that the focus wheel

    The Results

    Since both the Seagull and Yashica have a similar optical setup, admittedly with a 5mm difference between focal length, the results were quite close. Neither lens was super sharp at full aperture, usable but only just, major improvements were seen by f8 and gained a little more sharpness by f11, nothing more was gained by stopping down to f22. Vignetting was well controlled on both lenses, not causing serious issues at any aperture. The only major difference between the two cameras was that the lens on the Seagull showed  slightly better control of flare, this is due to the fact that the Haiou lens is multi coated rather than the single coating on the Yashicor lens.

    Seagull WWSC                                                                                        Yashica C

    Seagull WWSC                                                                                                      Yashica C

    Conclusions

    Either camera will give acceptable results, the lenses are not ‘state of the art’ sharp enough to provide a 30cm square print without too much trouble.

    The Seagull WWSC is suspected by many to have been built on old Japanese TLR tooling, the shutter has more than a passing resemblance to an early Copal shutter. Added to this the build quality is good but not stunning The WWSC is said to be the export quality of the Seagull 4a model. Putting a precise age on the WWSC is difficult due to the myriad of Seagull models released with little information on production dates.

    My Yashica C has definitely seen better days, but in saying that it is still a well built robust camera.

    Which camera would I recommend? Simple answer if you can find either one in good working order then both will give good results, just remember treat them carefully, set the shutter speed before cocking the shutter on the Yashica C and all will be ok

  • Agent Shadow – First Impression

    Whilst at the Photography Show in Birmingham last September I had the opportunity to meet with Stephen Dowling, the man behind Kosmo Foto and the promoter of two black and white negative films – Kosmo Foto Mono, rated at 100 ISO – available as 35mm and 120 roll film and the recently released Kosmo Foto Agent Shadow 400 ISO film, available as 35mm film which is being reviewed here.

    Neither film stock is a new emulsion, Mono is made by a European manufacturer (Foma) and Agent Shadow by a respected manufacturer with over 100 years experience. More about that later.

    There are those who would say that a rebadged film is a waste of time, but look at it this way – Ford does not make every component for their vehicles, a large number of parts are bought in from specialist manufacturers and nobody complains!

    On to the testing of Agent Shadow. I exposed one roll at the box speed of 400 ISO and a second roll at 3200 ISO. Agent Shadow is advertised as having the capability of being pushed to 6400 ISO. Both films were processed in 510 Pyro developer using the appropriate development times. Agent Shadow is marketed a being an emulsion harking back to the Film Noir Era, low light levels, lots of contrast and deep shadows. Both the rolls I exposed were taken under fairly flat lighting conditions, so contrast would be a bonus.

    For the purpose of the test I used a Nikon FM with either a Tokina 35-105mm f3.5-4.5 or a Nikkor 28 – 70 f2.8 lens. Exposure was set using a Gossen Lunasix lightmeter.

    How did the film perform?

    Having scanned both films at base settings I examined the results at 100% magnification in Photoshop. Both films displayed good contrast, a bit higher with the 3200 rated film – but this was to be expected and grain more evident but never obtrusive. Both films showed good levels of sharpness, combined with excellent shadow and highlight detail. Put plainly this film will work well under most conditions subject to correct development. If the film is processed in something like Rodinal, then expect more grain and a bit more contrast, but that is the nature of Rodinal and that is a matter of individual taste.

    Samples

    The above photographs were exposed at box speed of 400 ISO

    The above photographs were exposed at 3200 ISO and processed accordingly

    How does Agent Shadow rate against comparable films?

    In practical terms, Agent Shadow has a slightly coarser grain structure than Ilford HP5 and Kodak Tmax 400.

    Agent Shadow is described as ‘similar to Ilford HP5 but a little less silver content’. This is also the description given to Kentmere Pan 400 ( a clue to its heritage?)  The processing times are identical another clue? Similarly Agfa APX 400 and Rollei RPX 400 also share the same processing times and are also both marked as produced in the UK, likely to indicate that they are the same emulsion all produced by Harman (Ilford). However since everyone has a personal favourite brand this is hardly an issue.

    If you are looking for a good all round film that will push process well, look no further than Agent Shadow.