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Some time ago, I recall someone saying that the back focus on an Elmo projection lens can be adjusted. Does anyone know how this is done? When I project reg. 8mm on an Elmo K-110 , I get a wide , heavy graduated shadow at the borders of the frame. I am guessing that an adjustment of the back focus might help.
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Thomas, as far as I know it is not possible to change the back focal length of any lens without changing the specifications of the lens itself. I would love to use my Kodak f1.0 22mm lens in my GS1200, but that is not possible because the back focal length of the Ektar is much shorter than the Elmo f1.0 zoom lens, and I cannot push the lens close enough to the film when its in the GS1200 lens mount. No problem using the Ektar in the Eumig S938 Stereo though.
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That always seems to be an issue when trying to use certain lenses in different projectors. Sometimes they work, and sometimes they don't. I feel a level of success when better lenses are able to fit, or be retrofitted into a different machine. Believe me I've had some pretty interesting DIY retro fits that ended up working. Sometimes though, the end result wasn't what I was looking for, but it worked enough to keep it!Originally posted by Paul Adsett View PostComment
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