Is this a bent rf coupling arm?

itf

itchy trigger finger
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Jan 8, 2007
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My M4-2 is doing a few strange things. One has been grabbing my attention since I've had it, and that is that the framelines get stuck at infinity (well they actually get stuck at the furthest you've focused the lens, for example if you focus to three metres then back to .7 they'll stay at the 3m position) until I remove the lens or move the frameline preview lever. This only happens when I use ltm lenses on adapters.

It's been doing this since I had the camera (about 5 months), but after buying an ltm lens that actually has rf coupling (was only ever using cv snapshot before, though I have a Jupiter 8) I finally sat down to try to figure it out.

It turns out that the follower cam is catching very slightly on part of the lens mount above it, when there is no lens on the camera its enough to stop the cam moving out any more (until I move the preview lever), but with a lens on the cam will follow all the way (ltm or M).

The new discovery is that with any lens, the vertical alignment goes from being fine for further distances to significantly out below 1m. I hadn't noticed this before, guess I don't often focus closer than 1m.

I'm really wishing I had've returned this camera when I bought it. It had a couple of minor problems when I received it (the framelines thing, slow changing framelines with the preview lever, flash sync port cross threaded), but then I dropped it and though it wasn't a big hit it was enough to put the rf out I thought that seeing I had to have it repaired anyway...

So, what do you think? It seems pretty obvious I guess, and its getting to be an expensive M4-2. Again, pointless selling it without getting it repaired but I'm getting pretty tired of it :bang:
 
Sorry to hear about this. You are not alone. My first M3 had shutter problems develop one month out of warranty. I got a cla sooner than I wanted. It sounds like you need professional service. That said, there seems to be a growing consensus to do a full cla only when needed so to keep costs down you might be able to service only the current finder problem. Good Luck. Joe
 
Suggest you send it to have the immediate problem set right. A good technician will honestly tell you what other work it needs -- if it needs any.
 
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