Well, I've never had good eyesight. One of the quibbles I had with all of the OMs was that I could not see the entire frame with my glasses on, cannot see anything clearly beyond 10~12 inches without glasses. So the adjustable diopter on the 3 and 4 meant that I could at least use them without an accessory, but alas I had to use them without glasses, meaning that my glasses were constantly going on and off - an unacceptable process. The Nikon F was a revelation the first time I looked through the finder - I could see the whole frame with glasses! This, plus the fact that with an F what you see is exactly what you get, compounded by the fact that the early 4 I had used batteries like a junkie uses heroin, meant the Olympus system was going down the road.
Originally Posted by Les Sarile