I was out doing some street photography with my M2 and pulled up this rangefinder to capture a woman sitting on a bench in a small town reading a book. A small girl was walking by and I took the shot.
Walking back to the car I was internally proud of the shot until I opened the car door and was putting the camera in its bag when I noticed I had a 90mm mounted on the camera and I just knew I had used the entire 35mm frame lines to capture the image and I was very close to the action.
So I knew I did it, shot the wrong #$%^& frame lines on a unique unrepeatable moment. Have you done this too?
As an M2 user, I can't understand how you could do that, as the frame finders change to the lens you are using. Only by accidently moving your finger on the frame finder can you make such a mistake.
In my 40 plus years of shooting I have never made a single mistake, multiple mistakes yes, many times, but never a single one. However, on another point, I am so worried about burning a hole in the curtain of my M6, I always replace the lens cap immediately after I take a photo when outside in the sun. The LEDs flashing help remind me later to take it off.