The Beck has 1" back focus
Thanks guys, obviously I not an lens expert
I will try them all slowly with historic film. aka X-Ray
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# 6 of 6 Last one for a while
This one is simple, it has no markings that I can find with a light and a magnifier. Zilch
It is 6" tall, Hood OD 3.5" 2 elements, cleaned up nicely, no flange
https://live.staticflickr.com/65535/...896e4668_c.jpgNo DATA on lens side by TIN CAN COLLEGE, on Flickr
https://live.staticflickr.com/65535/...7baab39d_c.jpgNo Data Top by TIN CAN COLLEGE, on Flickr
If the Beck has a 1-inch back focus, there's something wrong with it, probably the wrong elements. It won't cover whole plate or even 4x5 like that. :(
But you have some real gems with the other lenses! :)
Just found this from 2015
Amedeus Photography
https://amedeusphoto.zenfolio.com/bl...ortrait-4-lens
Flange back focus distance
The 1st lens I described in this thread, PORTRAIT LENS SERIES C. 8 x 10 Fowler & Slater Cleveland, aka https://amedeusphoto.zenfolio.com/bl...ortrait-4-lens
Need an idea of rear flange to GG distance necessary at infinity, just to make sure I can get my standards close enough
I need to modify a camera to fit this monster, it is long and heavy needing a very sturdy front standard
My SC 11X14 Deardorff has limits, maybe my Levy copy camera is better suited