Arsenal Industar-50 50mm f3.5 SnN67019499 The "Fiddly" Front Ring: The

The "Fiddly" Front Ring: The most notorious quirk of this lens is its tiny size

Note: Because this was built for early Soviet Zenit SLRs rather than rangefinders

it flares dramatically when exposed to direct sunlight

it has a 45

Optical Formula: 4 elements in 3 groups

Arsenal Industar-50 50mm f3.5 SnN67019499 The "Fiddly" Front Ring: TheThis Arsenal Industar 50 50mm f 3. 5 (Serial Number 67019499) is a fascinating piece of Soviet optical history with a unique provenance. While the Industar 50 was primarily mass produced by the KMZ factory near Moscow, your specific copy was manufactured by the Arsenal factory in Kyiv, Ukraine (indicated by the "Arsenal" branding) and was originally sold or cataloged by specialty vintage vendors like WOW Vintage Optics. [1, 2] Decoding your serial