>>Ya do wot works

Exactly! But has it occurred to you that you only need a single diopter adjustment (and possibly cylinder) to see at a single distance? Even with optical viewfinders, the entire image (near and far) is effectively at the same distance as the guidelines and in-viewfinder info strip. I need to let my glasses drop back down if I'm going to be looking at the menu (or at whatever I'm shooting).

My vision is pretty terrible (adjustable diopter for the eyepiece won't go far enough for me) but I had that figured out back when I switched from Exacta (waist level finder) to Nikon. On Nikon Fs, the top part of the eyepiece unscrews and they sell a diopter adjust piece that screws in place. Same deal with their digitals. I had to find a square-to-round adapter for my D7000, but a FE diopter adjuster fit right on.

I have to let my glasses drop back down from my forehead to see w/o the camera, but that's not as bad as Adam's 'glasses hanging on a neck cord'.

For any Nikon folks, with a rectangular eyepiece, you want the Nikon DK-22 adapter, a for-FE diopter adjuster. and a DK-3 rubber eyecup. Getting it all to thread together is a bit tricky as there isn't a lot of extra room in the threads to ft the eyecup. I use locktite blue so there's no time pressure to get it connected but it then hardens up. If you break one of the 'fingers' on the DK-22, it won't unscrew, you have to cut it off, so buy a spare.

If you've got one of the Nikon models with round eyepiece, you'd need different parts.

Hope that helps somebody...