william_littman1 Posted February 24, 2016 Share Posted February 24, 2016 <p>When I introduced my first camera on March 11th of 2000 digital capture was still under development and large format was still the only way to obtain high definition images. After 2011 digital has caught up and last week at a book signing one of the most renowned fashion Photographers famous for his use of 8x10 told me his 35mm digital is sharper than his 8x 10 and he loves it.<br /> Such change which is echoed throughout the professional arena has caused a change in direction and justification for the so called conversion .<br /> I will post a list of numbered issues so as to address the changes .<br /> 1)Sharpness depth of field and even focus throughout the plane<br /> a hand held camera cannot be used for stop down photography <br /> a small sensor or capture area has a greater depth of field appearance than a larger area <br /> to address this issue for hand held use we introduced perfectible parallelism in 2007 to increase the sharpness by several stops without having to use smaller lens openings.<br /> 2) Bellows<br /> most so called conversions have been issued using the original Polaroid bellows except for our company and one other and which have many pinhole light leaks in the corners of the folds.<br /> these are intermittently masked by the fact the inner and outer bellows have become separated by the drying of the glue over time and so may give the impression of light tight when tested but intermittent leaks when shooting which cant be found until the bellows are torn apart and seen under a light.<br /> 3)Patents<br /> We haven't sued anyone who has made a camera for their own use and no longer care to address such issues as it was important at the onset but no longer is.<br /> 4) Lens interchangeability<br /> Firstly <br /> The basic configuration of these cameras doesn't allow for multiple cropping settings and doesn't allow for multiple cam settings <br /> therefore one would at best get one lens to focus crop while coupled that would be the first limitation but most importantly the limited bellow extension determines that the range cap off at 150mm .<br /> lens interchangeability is therefore pointless for the hand held application and weakens the structural so we abstained .<br /> All these cameras can be at best is like a big Makina 67 for responsive and spontaneous capture .<br /> trying to force it to be something else is IMHO pointless at a time when a Linhof which can do all else well is relatively inexpensive so I continue to recommend such camera for all Tripod use and use it myself..</p><p>5) 2 sided holders versus Grafmatics<br /> again up to 2011 I would say Lf photography remained the sole source for HD imagery and as most LF <br /> lenses were design for optimum performance around f 22 that sort of excludes the use of hand held 4x5 at wide open apertures and if performing fine is already a stretch when expecting to use fast shutter speeds.<br /> It is for this reason we have been very persistent in recommending the avoidance of 2 sided holders because as Schneider had posted in their website when they still made LF lenses " there is a 4mm play"<br /> .10 mm enough to defocus a photograph.<br /> We took this strict position during the testing of perfectible parallelism in 2007.<br /> 2 identical cameras were sent out and one was doing great and the other one horrible.<br /> the one which was underperforming kept being sent back and to our surprise had no malfunction.<br /> 4 months into the testing the guy travelled and left his 2 sided holders home because of the weight and <br /> borrowed a grafmatic from a friend and the film came back being of comparable quality to the other camera .<br /> So it is my position that if you can dimple strap down or tie the old holders it is idiotic for hand held use <br /> because you cannot stop down the lens to compensate for holder inefficiency.<br /> I will post the remainder of the relevant issues as time permits.<br /> Thank you.</p> Link to comment Share on other sites More sharing options...
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