ZK Zorki 5cm f/2 (ЗК Зоркий for Kiev/Contax bayonet.
This is the forerunner of the Jupiter-8 and is still partially (completely?)
assembled from sacked Zeiss parts.
The Industar-10, Industar-22 and Industar-50 make up the vast majority of Russian collapsible LTM lenses.
The Industar-50 was produced mainly by KMZ and LZOS.
There also exists a KOMZ-version, "Made in Kazan", which is considerably much rarer then the KMZ and LZOS versions.
The lens that I present here is such a KOMZ Industar-50.
Lens: Industar-50 5cm f/3.5 П "made in Kazan"
Camera: NEX-5
The Industar-50 has many incarnations: collapsible, rigid, LTM, M39 Zenit, M42.
This lens is a collapsible incarnation.
The collapsible Industar-50 reincarnated at 3 factories: KMZ, LZOS and KOMZ.
This copy comes from the LZOS manufacturing grounds
That hood is a DIY out of plumbing pipe I had sitting around. Sanded it down and painted the inside matte black, and attached with screws. Then at some point I found a series 7(6?) filter adapter that fit nicely, which made a world of difference with ease of use