Voigtlander Collinear II No.5 f6.3

[qiutaolee]

What is the focal lengt Voigtlander Collinear II No.5 f6.3? How about the coverage in 8x10 about Voigtlander Collinear II No.5 f6.3? What is the different between Collinear II f6.3 and Collinear III f7.7? Thanks!

[Ernest Purdum]

The focal length of the Series II, No. 5 is 9 7/8" (250mm). It is not recommended for 8" X 10". The maker stated that at "medium stop" (f16 maybe) it would cover 7" X 9" or 5" X 8" wide open. The Series III, in addition to being a little slower, worked at a wider angle - up to about 90 degrees. It is also, of course, a little smaller and lighter and, when new, was a few dollarsl ess expensive.