ScottPhotoCo
23-Nov-2015, 15:16
Hello all,
I just received a Carl Zeiss, Jena marked No. 276052 Tessar 1:4,5 F~ 21CM DRP IIA. It is in beautiful shape but it looks like the f-stops are marked as millimeters. I've never seen this before. The scale seems to run from 4 to 39 with 4 being the smallest opening and 39 the largest. Have any of you seen this before? What is the easiest way to determine the more standard f-stop for ease of use?
Thanks in advance!
142640
142641
I just received a Carl Zeiss, Jena marked No. 276052 Tessar 1:4,5 F~ 21CM DRP IIA. It is in beautiful shape but it looks like the f-stops are marked as millimeters. I've never seen this before. The scale seems to run from 4 to 39 with 4 being the smallest opening and 39 the largest. Have any of you seen this before? What is the easiest way to determine the more standard f-stop for ease of use?
Thanks in advance!
142640
142641