blp1664886145

I just took a look and compared my lens to some of the photos on the page and it appears to look very much like the Zeiss Jena ..so it was probably copied by whatever company in Japan

Thank you .. more than I've been able to find. I'll have to see if an Exacta to E mount will let me mount it and see how it performs .. *if* it still works. However focus and aperture rings work well ...

Thank you

Thank you

it's 37mm across

Has anyone heard of this company? I have a Coleman-Dynamic Optics 50mm f2.8 lens. Aperture range is 2.8 to 22. It may perhaps be an enlarging lens. Lens is approximately 2 1/2 inches high, and about the same width. Aperture ring is in front focus ring behind. I have not been able to find anything at all about this lens, I've even contacted a few camera shops who also knew nothing of this lens. I'm at the baffled stage at the moment Thanks in advance for any guidance

It is a Komura 135mm f3.5 lens s/n 512345 which was part of a lot I bought a while ago. Last remaining mount to identify. I think it might be Praktika, but not sure Thank you in advance for any information