Nikon FM: Focus Screen Replacement
Originally posted on Instagram. Notes from the repair bench, kept here as a searchable archive. View the original on Instagram
Nikon FM focus screen replacement. While the Nikon FE, FE2 and FM2 have user replaceable focus screens, not so much with the Nikon FM. On early FM bodies (the ones with the motor drive switch under the release button) the top cover and prism needed to be removed to access the focus screen. In later versions of the FM, it’s a bit easier as the screen comes out through the mirror box. Still not what I would call a user replaceable screen as there are several parts to the screen (as shown in the first photo) and it is a little tricky to install with a risk to damage the new screen. The second photo shows the old style FM with prism needing removal to replace and the third photo shows the newer style with a screw holding the focus screen clamp in place.
