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Karlpeter
11-Oct-2016, 15:39
I'm looking for information about a barrel lens I bought some years ago. It's a Steinheil Orthostigmat München 6.8/24 cm. Serial number 90291. How old? Image circle?

Peter

Dan Fromm
11-Oct-2016, 15:58
The VM says it is similar to Steinheil's Kollinear, should cover ~ 85 degrees at small apertures. Yours was likely made around 1919, according to P-H Pont's Steinheil chronology no later than 1920.

jesse
12-Oct-2016, 05:55
https://c3.staticflickr.com/6/5677/29982434010_59182172bd_o.jpg

jesse
12-Oct-2016, 05:59
It can cover 10x12" at small stop.