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Okay so, a month ago, when I had my M3 serviced (again), I wrote the following post: So the 2nd and 3rd issues (since they are owing to the same reason) I mentioned in the previous post still remains even after the service this time round. The photo I uploaded here is one of the 76 frames that I only took a bright sunny blue sky to test the performance of the shutter. (I’ve used two rolls only for this, they look practically almost the same so I only present one here). The settings were f/8 and 1/1000s (ISO 400 film), and the lens was Summicron 50 mm. We can assume that vignetting can be ruled out. You can see the left upper side of the frame is much darker than the other part of the frame. The right side of the frame is also slighted darker probably because of the same shutter issue, but it is not as severe, so let’s ignore that for now. What I wanna ask you is, if you were me, would you just ignore this shading issue and just use the camera or try your absolute best to fix this? Somewhere in RangefinderForum, I read someone saying “even at Leica, the tolerance limit for the 1/1000 shutter speed is 20% as it is prone to be out of calibration”. (Link: https://rangefinderforum.com/threads/leica-m-1-1000-uneven-shutter-issues.79230/) Also, the experiment was conducted under a very extreme conditions, so I presume in practice it won’t be as noticeable. Additionally, I’ve seen many people saying that even for newer Leica M film bodies, the 1/1000 speed tends to be an issue quite frequently. Considering all this, does this seem to be an acceptable condition that you’d use this camera after biting the bullet, or would you try your absolute best to fix this issue by trying other servicemen as many of you suggested? I’d like to see what you guys think. Thank you.

I'll try to make it short so that people actually care to read. I wonder how many people, M3 users in this forum, have experienced shutter-related issues with their M3. In my case, I've had: a problem that the images have some faint horizontal lines across the frame uneven exposure across the frame (i.e. broad vertical lines/shades) Shutter capping (i.e. complete darkness on either the left or the right side of the frame) Important point I want to emphasise here is that I've always had a Leica-certified serviceman fix my camera (Camera Doctor, Mr Kim; I live in Seoul, Korea, if you know you know). happens owing to the dust particles stuck between the shutter curtains, according to the serviceman; a simple cleaning job will fix this issue, he said, but even after doing so, it happens quite often. (Refer to the first pic, in the foreground, you can see it more clearly) happens a lot, especially at the higher shutter speeds (i.e. 1/500 and 1/1000 s). This happens in various styles, but the most common one for me is that the left side of the frame appears a bit darker than the rest of the frame. I know this happens because the shutter slit distance is not consistent during the movement. (Refer to the second pic, you can also see a faint horizontal line as well, probably owing to the first issue) happened only once, and the weather was very cold, almost close to 0°C. The camera was serviced, and it has never shown the same issue (just yet), although I have yet to test at such a low temperature. "2" happens the most and irritates me the most, but my serviceman said it is inevitable since the camera is very old, so the inside mechanism has been worn out, which causes the inconsistent functioning. I then asked him would I be better off buying another M3 body, but he said my camera is actually in good condition considering the age. What I want to know from the M3 users is how many of you have experienced this problem with the shutter mechanism, and how did you deal with it? Would be nice to know if this is a common problem that I just need to concede and carry on, or if I've got the shit one and been unlucky. This is not a scanning issue as this same problem appears on different pics as well. This has been a problem for me, I’ve posted a similar issue about a year ago: here (Reddit post) And then as you can find in the comments of the post, someone else reported a similar problem. It happened with an M6. M6 with the same problem (Reddit post) I honestly just wanna use the camera and enjoy the photography itself without worrying about how the image will turn out every time I send the films to the lab, because each time I found some faulty photos, it just takes me back and makes me not want to do this hobby anymore (let alone the increasing price of the films). Since I love 50 mm so much, getting other M-bodies is also not really a solution for me (again, that will cost me a fortune as well). Thanks for reading this long complaint. I hope I can find some answers and peace.