mshchem
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Aha, that should work. Thanks for all the info. This is an important topic as all these enlargers age and original lamps and bulbs get hard to find.
Cool; what kind of light source is it?
This is all PWM controlled (16 bit), so not a problem. Also, this is for my Durst 138 which is a 5x7" enlarger (I only use it up to 4x5" though). I find this power level is actually OK; it's plenty fast enough for color work but probably on the slow side for large B&W prints on warmtone paper - but I don't do those much, anyway. A previous version was around 350W RMS - this was a bit much. I actually implemented a digital ND filter to run it at down to 12.5% for smaller prints.
That's technically more than the formal education I've got in this area, lol!
It's a 10mm grid on the cutting mat, so the entire PCB is 100x56mm and the light emitting area is around 80x44mm. The limiting factor here is the old Intel cooler I had lying around and I wanted to mount this onto. The 350W version mentioned earlier was 100x160mm.
Yes, it would. The main trick is to get even illumination. Heiland does this by skipping any condensers and diffusion chambers already present in the enlarger and just plonking a large array of LEDs with a diffuser plate right on top of the negative carrier. I prefer to keep using the condensers in my 138, which is a little trickier, but also a little more efficient than the Heiland approach. So I'm effectively doing what you're proposing; the light source shown here will drop right on top of the existing bulb socket of the 138 (originally intended for an opal bulb btw; this is an oooold version). For smaller enlargers, you could do a smaller array of LEDs on a smaller PCB.
I was playing with the thought of doing this with a Durst M305 I was about to be gifted, but then I found a local skate club with some analog photography enthusiasts and decided to gift it to them so they can enlarge their color negatives with it.
5 rolls of HR-50 just cuz there ain't no more CMS twenny... sorry, just watched an episode of The Beverly Hillbillies over me brekkie. Forgot about my boy crush on Ellie May, and could that Jethro ever throw back them vittles!
Enlarger lens prices seemed to have dipped so I started looking for a multicoated 150mm and found a set 50, 80 and 150mm late Componon S lenses that are so sharp I may have to keep the old lenses in case I need to tone it down. Something I hadn't thought of while charging ahead.
LOL I said the same thing, then I found an adapter lens board I've been looking for. It's on its way. Now I just need a few Linhof boards.Couple books by Fan Ho, The Living Theatre and A Hong Kong Memoir. I also recently got two portfolios, each with 4 carbon transfer prints, by Jim Fitzgerald. Oh and two boxes of 8x10 FP-4 from Glass Key Photo here in SF. Got to lay off the photo purchases for a while.
Roger
Even the original Componons were spectacular.
I suppose that's the 'Glass Key' of Dashiell Hammett? I think perhaps I read it the first time while he was still living (1961?). I don't remember if he did photography.Couple books by Fan Ho, The Living Theatre and A Hong Kong Memoir. I also recently got two portfolios, each with 4 carbon transfer prints, by Jim Fitzgerald. Oh and two boxes of 8x10 FP-4 from Glass Key Photo here in SF. Got to lay off the photo purchases for a while.
Roger
I suppose that's the 'Glass Key' of Dashiell Hammett? I think perhaps I read it the first time while he was still living (1961?). I don't remember if he did photography.
I snagged a Minolta 16 MG w/ cartridge for about the same price as a 3D printed cartridge.
Picked up a Zeiss Ikon Box-Tengor 56/2 with a case from the bay in very good shape. I hope to shoot a test roll on Friday.
Zeiss Ikon Box-Tengor 56/2 with case
box-tengor 56-2 & case by Richard Hendrix, on Flickr
Zeiss Ikon Box-Tengor 56/2
Box-Tengor 56-2 by Richard Hendrix, on Flickr
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