dexdog
Veteran
The 5cm/f1.5 lens with 285 series serial number in the aluminum barrel may be a CZJ lens, but looks to be re-mounted at least in part in a Jupiter-3 barrel, as judged by the upper case 'M' on the focusing ring, and the lack of 'ears' on the aperture ring. Serial number corresponds to CZJ production records of December 1945 or so; I am not near my copy of Thiele's book of CZJ lenses, or I could look it up for you. I have a lens with a very close serial number, and it is a real CZJ product, with serial number stamped on the rear element, lower case 'm', ears on the aperture ring and internal parts numbers that match. The chrome lens in the first picture looks to be a well-made custom remount of an uncoated f2 lens produced in 1936 or so.
Best way to check out the f1.5 lens is unscrew the lens, and check for the last six digits of the serial number stamped on the rear element- this is usually a reliable indicator, although not dispositive in and of itself.
Best way to check out the f1.5 lens is unscrew the lens, and check for the last six digits of the serial number stamped on the rear element- this is usually a reliable indicator, although not dispositive in and of itself.
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