I seem to have lost the eyecup on my Nikon D750, I just noticed it was gone. Don't know how, when, or where! After doing some research, it appears to be a design flaw with the D70. Just wondering if any other Hoggers have experienced this, and if so, did you come up with a viable solution, other than carrying some extras in your camera gear bag.
I have 'lost' the eyecup from my D7100 several times - and found it several times. At the present time, it is AWOL. Generally, I discover it somewhere in the bowels of my camera bag which has many little hiding places. It seems that the eyecup does loosen up with time.