Lens Sizes for Enlarging
I currently use a El-Nikkor 80/5.6 for my 6x6 negatives using a Beseler 23 series enlarger.
Can I use the same lens for 6x7 and 6x9 or do I need a different lens?
AIR, the rule of thumb back in the day was your enlarging lens needed to be
at least the normal lens focal length, (unless you owned a WA Rodaogon/Componon/Whatnotogon, some of which were known to compromise corner sharpness at the baseboard). For 35mm, that was about 50mm; for 6x7, it was 90mm and for 4x5 you'd want 150mm.
But for
optimal sharpness and coverage though, the Old Hands said to go the next length up to ensure the best enlargements possible. The gurus suggested 80mm for 35; 115 (or so) for 6x7; and 180 for 4x5. Thus for economy and best prints, if your enlarger had the capacity, you'd buy something in the 110 range for
any roll film and never have a problem--so long as your enlager would raise high enough for the 110 lens to get your 35mm negative up to the print size you wanted.
This was the big advatage of the Beseler 23: being a double-column design, you could use a 110mm enlarging lens on a 35mm negative to make a 16x20 print and not have to worry about blurring the image because the head was up in the clouds swaying in the breeze like a Durst or Omega might.
With that in mind, I found a terrific Wollensak 4-element Raptar f/4, 127mm lens locally in fine shape for--
drum roll--$25.00! Now that I'm shooting 6x9 it's perfect, covers well and sharp corner to corner. Add that to the nice, used Beseler 23 at the same shop I snagged for--wait for it--$100 and this ol' shutterbug is ready to rumble.
Wollensak lenses are not well known today, however, they were well regarded in ancient times--even if they weren't the most technically advanced glass in the world. They were very well made, and the grain magnifier would attest to their sharpness and coverage on the print paper which is where it really counts. You can get them very inexpensively nearly anywhere and be right proud of the prints you'll make. The more expensive, modern designs only help if you are doing color at home, where the improvements of multicoated, apochromatic, ED glass will be clearly observed.
Viva le (monchrome) film!!
