Why do people lose the eyepieces?

I've lost about three big, rubber cup type eyepeices off my Nikon F2, so I've given up and put the original smaller one back on.

There's a round metal ring on the front of a Canon Model P next to the lens mount that's for the focus adjustment (?) that can get unscrewed off and lost, so I loctited it.
 
mine fell off within a week of buying the camera - the flash plug also disappeared within 6 months. Guess I'm just careless. the camera works fine though, and that's the important thing ..........
 
The eyepieces are the same as the Nikon ones, and I've found that they come off Nikons easily. The Leica M ones fit more snugly and don't come off.

You need to be careful choosing Nikon eyepieces because of their diopter value. There's a pdf on their web site explaining that the value stamped on the eyepiece is its own value combined with the diopter intrinsic in the whole viewfinder optics (which is -1.0). The one sold as "replacement" has no diopter value (i.e. it's flat) and the one sold as "Neutral 0.0" is actually +1 diopter. At least, that's my understanding.
 
I lost mine sometime in the last few days. Prior to that I would always notice it working loose. I have also lost the PC sync cover. 😱

Is there any adverse effect to not having the eyepiece on the camera? I havent noticed any difference...aside from having one less element to keep clean!
 
Just looked at this thread by accident (Bessa R doesn't have this problem) and realized your eyepiece is the same as my F-801 slr. Do what I did for it:

Take the camera with you to a hardware store... the old fashioned kind. Ask to see their "O ring" selection. Find the size that fits and buy 3 or 4 (they're cheap - like 80 cents each) and a bottle of contact cement (about $4). Go home, rough one side of one O ring on sandpaper (or a fingernail emery board).

Spread a little contact cement on a piece of card stock, and press the rough side of the O ring into it. Remove the O ring, turn it over and let it dry completely (allow 15/20 minutes.) With a toothpick or the stick from a cotton swab, carefully run a line of contact cement around the outside rim of the eypiece and let it dry completely.

When both are dry, position carefully and press together. Other than drying time, the whole procedure should take less time than it took "old two-fingers" to type this. This procedure also works well on eyeglass-killing Rooski rangefinders.
 
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It's not just the eyepiece.

There's the little panel the eyepiece screws onto. It's about 1cm square, and held on by two tiny screws. Those screws keep coming undone too, and twice a year I need to go to the optician's shop for them to replace and tighten for me.

The optician because there's no camera repair place anywhere near and the optician has small screws for spectacles.
 
Just lost eyepiece on my nikon fe2 (sorry, my bessa r3a has its shutter jammed and is in camera hospital at the moment). I don't think I've lost anything valuable, I still can focus, can see through viewfinder, and I don't scratch glasses (don't have ones).

The only problem I have with it is that camera looks "naked" and incomplete without it. 🙁 maybe will spend some money on eyepiece in distant future.
 
kully has the best idea. one drop of clear nail polish and screw it onto the camera. It will not come off casually but it will if you grasp and turn it.
 
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