If you’re considering buying an M42 mount lens, then this “little” database is the place to go for information on – I think – all M42 lens ever made. I have personally used it a couple of time, when I was on the lookout for an M42 lens.
Otherwise, there are not that much more to say about the site.
So go have a look right here: M42 Lens Database
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
