Additionally useful photography links: these link to other reviews I did years ago. As the pages are linked across the internet I wished not to move their URL’s. So rather than duplicate them here I have left them as they were.

Battery adapters, supplied to replace the now banned PX625 PX-13 mercury battery. This alternative has been a solution to 1000’s of customers worldwide.
Classic and Collectable Cameras: details and information on repairs

Further details of working on the Zorki 4 and FED 2 can be seen here