I've read a few threads about this, but I'm still a bit confused. Recently the stock eyecup (well, bit of rubber) on my D300 broke. Having wanted a round eyecup for a while, this a perfectly good excuse to get one. So what is the best way to get a round eyecup on a D300? Am I right in thinking that doing it with Nikon parts, I will need; DK-3 DK-22 adapter FM2 eyepiece I can find the DK-3 and DK-22 here in the UK, but not the FM2 eyepiece. Any ideas for UK sources? Does the FM2 eyepiece include glass, or does it just sandwich the DK-3 and DK-22 together? Does this setup vignette or cause any problems? Are there any cheaper or easier alternatives out there? I know there is the hoodman option, but I ideally want a fully round eyecup, not an elongated one. Is there a way to get a round, magnified eyepiece on the D300? Is magnification worth it? Does this cause any vignetting, or do you just see the viewfinder on a larger piece of glass?