100% crop of previous pic with lens wide open
And at f9.
At f12.5 appears the same. (Closing down more, the image deteriorates and the glass air bubbles begin to appear on the image.)
Also a quick check on a 13X18 camera saw that there is heavy vigneting with lens closed down even at f12.5.
Serial number of the camera begin with D letter and shutter serial number is 213399. From what i can tell this must be a camera from around 1913/14.
Also this vertical type of Toska camera can not be found in catalogs after WWI as far as i know.
Is there any chart with Compound shutter serial numbers somewhere?
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