Does anyone know if there is mirror foam on Nikon FM where the mirror flips up against the focusing screen? The reason I ask is that I picked up a Nikon FM (the newer one without the knurled ring around the shutter release) at a camera fair recently for £20. The screen was in a bad way, someone had removed it, scratched it and then put it in the frame the wrong way round then put it back in. The rest of the foam in the camera needs replacing but there is no foam and no evidence of any residue around the bottom of the screen location. My FM2's have foam there, and I was going to put a strip in as a mirror bumper but I'm not sure there was ever any there. There is usually some gunk to show where the foam used to be but nothing on this camera. Puzzling.
For anyone who finds their way here looking at screen replacement in FMs, the older FM with the knurled ring around the shutter release has no easy way to remove the focusing screen - you have to go in through the top and remove the pentaprism first, the screen sits under that. For the newer FM without the knurled ring, there is a screw just above the focusing screen, if you remove that, the screen drops down. It's mounted (clipped) inside a thin metal frame. Screens for FM2 and FE/FE2 won't fit as they have a tab on them that would have to be removed and also the original FM screen has a partial cut-out on one side that fits into a tab under the prism, so even if you did get a screen to fit, I'm not sure it would lay flat against the prism as the tab wouldn't fit into the cut-out. I don't know if FM screens were ever interchangeable by technicians, but I'd like to find a replacement one day for this camera. Apart from the screen and a small scratch on the underside of the prism, it's pretty much mint. Not bad for £20....
For anyone who finds their way here looking at screen replacement in FMs, the older FM with the knurled ring around the shutter release has no easy way to remove the focusing screen - you have to go in through the top and remove the pentaprism first, the screen sits under that. For the newer FM without the knurled ring, there is a screw just above the focusing screen, if you remove that, the screen drops down. It's mounted (clipped) inside a thin metal frame. Screens for FM2 and FE/FE2 won't fit as they have a tab on them that would have to be removed and also the original FM screen has a partial cut-out on one side that fits into a tab under the prism, so even if you did get a screen to fit, I'm not sure it would lay flat against the prism as the tab wouldn't fit into the cut-out. I don't know if FM screens were ever interchangeable by technicians, but I'd like to find a replacement one day for this camera. Apart from the screen and a small scratch on the underside of the prism, it's pretty much mint. Not bad for £20....
