Notes from October 2008

Lens solution for Eastman projector

I'm working with Walt and James to determine a lens fitting solution for the Eastman. I have an ISCO 35-65mm f1.3 and an old Bell & Howell 50mm f1.2, both of which I'm trying to fit to the Eastman's lens holder/collar. The lenses either have to be turned back by milling, a process which compromises the structural integrity of the lens (particularly the ISCO), or a new lens holder would have to be fabricated. The latter could be very costly if only making a single piece, but to make more than one could be useless, since I have no idea what the demand would be for such an item, low I would imagine. It really is the weak link of an otherwise perfect projector. In the meantime, I've been using a not-so-wonderful stock Eastman 52mm lens. It does not have the sharpness of the ISCO, so focusing the lens is nearly impossible, especially across the whole frame. Rather frustrating when trying to check focus on camera rolls.

October 27, 2008  –  permalink