I was this last week just finishing a pressing job for a German psychologist finalizing for the printer the design of a deck of cards used in therapy and group sessions. Check it out::
At the same time, I was mulling the idea of building that 16x20 view camera to shoot Ambrotypes on glass, and researched the kind of lenses that would cover a 16x20 format. The cheapest way to go was to find a used process lens made from the copy cameras that were used by the printing industry in the 20th century to make large color separations. I found one on eBay sold by a reputable souther dealer know for trading used gear: www.gulfcoastcamera.com
The lens is a Zeiss Jena APO-Tessar 600mm) f/9 Process Lens, and it came with a Sinar Lens Board for $250. It is clean, clear, and the iris works smoothly with fStops down to 90.
It is a massive piece of glass and weights about 2.5 lbs. It does not actually covers the 16x20 format at infinity, but is supposed to work fine for portraits, as per Google AI:
As big as it is , it is by no means the biggest of this series of Apo-Tessars. There are also a 750mm and a huge 90mm, which totally dwarf it:
If I could get my hands on one of these, I could build a 20x24, even a 24x30...!
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