Scratch on condenser lens

[William Mortensen]

Grump- this will be tried, hopefully tomorrow. The big question is whether the illumination stays even. I'll try them with no condenser at all too, though this will lower the contrast to diffusion level, I presume.

Dan- it's on a Bessler 23C. I've also got one on a Durst 6x7. My D2 and D2V are fine... for now, (gol-durn high school kids! Gotta love 'em, though.) Thanks for the offer!

Hermit- thanks for your offer also, but I think I know where I can get some for free locally.

As always, a great resource here!

[Donald Qualls]

FWIW, I have a Zone VI cold light and use VC paper by preference. Works fine, though I only split filter, and don't attempt to hit a specific grade and then transfer that information to another enlarger...

[William Mortensen]

Odd, I had a Besseler 57MB (5x7) with a Cold head light source. Filters had almost no effect on the contrast of VC papers. I think the light was fairly blue, so it may have been too restricted a wavelength to properly expose both emulsions when filtered.

BTW, does anyone know who invented the Cold head enlarger?

[Bruce Pottorff]

Mark,
Piece o' cake. I've got several 23Cs in my classroom for parts. I can send you a cond. lens. You pay shipping.

Bruce

[Oren Grad]

Odd, I had a Besseler 57MB (5x7) with a Cold head light source. Filters had almost no effect on the contrast of VC papers. I think the light was fairly blue, so it may have been too restricted a wavelength to properly expose both emulsions when filtered.

Mark, the Aristo V54 lamp was designed to fix that problem.