Tim Layton
11-Dec-2011, 18:18
Hi, I just picked up a 12" and a 10" Baush and Lomb barrel lenses which I think are projection style lenses. Both can mount in a barrel that I have and are in good working order. I've tested the 12" on my 8x10 and the 10" on my 5x7 and all seems okay.
I am just trying to learn more about what I have exactly. The vintage lenses are a new thing for me so I am sure I am not even describing them correctly. I was told they are Triplets, but I am not sure what that means or how to tell if they are in fact Triplets or not. Any help and pointers in the right direction would be appreciated. To determine the f/stop I just divided the length by the diameter and used that as a starting place.
Thanks,
Tim
I am just trying to learn more about what I have exactly. The vintage lenses are a new thing for me so I am sure I am not even describing them correctly. I was told they are Triplets, but I am not sure what that means or how to tell if they are in fact Triplets or not. Any help and pointers in the right direction would be appreciated. To determine the f/stop I just divided the length by the diameter and used that as a starting place.
Thanks,
Tim