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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
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.
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.
https://uploads.tapatalk-cdn.com/202...c274183a6f.jpg
My version is branded by Calumet. Maybe this weekend I will try it out on an 11x14,
https://uploads.tapatalk-cdn.com/202...d457a6bd0e.jpg
Nicely done, thank you.
David
There are 4 reflections, indeed.
Attachment 204260