Allow me to add to this frey, what would be the bellows length for this 508mm ? I did see "Acutar" on the fleebay and it's rather spendy.
Les
Long. It is a 500 mm lens of normal construction, will want ~ 500 mm extension to focus to infinity. Closer will need more.Originally Posted by Leszek Vogt
Spendy? Asking isn't getting.
Dan, i think we all know that you do your homework. And I, for one, appreciate the fact that you share the hard-earned knowledge.
Thanks for the post of the Calumet catalog
On page 30:
L-120 500mm Caltar (20") f/6.3 Acme M/X $330.00
interesting... have never come across or even heard of this version of a 500mm Caltar.
Pretty sure that is a misprint and the copy editors just got into the rhythm of 6.3 and forgot the 500mm was the exception at f7.
Or could have been a 500mm f/6.3 Bausch & Lomb Plastigmat listed in my Burke & James catalog as covering 11x14, pre Calumet outsourcing to ILEX....
na, I think you're correct it's a misprint.
But now will be on the lookout for a 500mm f/6.3 Bausch & Lomb Plastigmat
Based on the conversation here I picked up one of the 20” f7 Ilex lenses. I can now verify that it is indeed a Tessar, not a triplet, as witnessed by the doublet rear element. This also verifies that, as is usual, Dan is correct.
My version is branded by Calumet. Maybe this weekend I will try it out on an 11x14,
Last edited by Jason Greenberg Motamedi; 31-Mar-2020 at 15:07.
Nicely done, thank you.
David
There are 4 reflections, indeed.
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