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Author Topic: Suggestions for small lamp for 35mm home projector setup Randy Stankey Film God Posts: 6539 From: Erie, Pennsylvania Registered: Jun 99 posted 09-09-2019 05:32 PM                     What if you cannibalized the head from an old, unused photographic enlarger? Something like a Simmons Omega D2 that has a fairly large reflector and a long-ish focal distance. The Omega has swappable columator units to focus the light down to different aperture sizes. I have columators for my Omega for use with 4x5, 120 and 35mm film. The down sides that I can think of would be how to get a bright enough lamp and how to get enough cooling for said lamp. Maybe you could fabri-cobble together the lamp from a slide projector and a columator from an enlarger. I dunno’. Just spitballing.  |  IP: Logged Jonathan Wood Expert Film Handler Posts: 206 From: Oxfordshire, United kingdom Registered: Jan 2008 posted 09-10-2019 02:50 PM                     Hi Steve, sorry for the late reply . Yes , I use xenon . I did try a few halogen alternatives but I gave up as the output wasn’t good enough , plus all non faded colour prints are timed for a xenon light source and I didn’t like the colour rendition from a halogen source. Some people have had success using the 36vdc/400w (EVD?)bulb but if you use a cannibalised OHP projector as your donor then you’ll need a modified condenser as the one in the OHP is designed to spread light over a wide area with minimum throw. If you think about the size of the 35mm aperture, then this is where you need to focus all the light energy of the bulb. So you need a optical system that will do this rather than let all that light stray around inside the lamphouse. There is an 800w/230vac bulb commonly used in a ‘Red head ‘ tungsten lamp which although not the same length as a xenon , it does share a similar tubular construction, it might be possible to mount this within a xenon lamphouse mirror along the same axis as a xenon and het a reasonable output. You should t have any flicker issues as the filament never really dims enough on the ac cycle to cause a problem . Ive never tried it , but it was the next thing I was going to try before I went with xenon. Do you have a lamphouse with a mirror ?  |  IP: Logged

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