>I'm sorry for being dense, or still asleep, but I don't >understand that chart or how you reach this conclusion. I >don't see D600 anywhere on it, and I can't tell which parts >are the rubber eyecups. The 2925 isn't an eyecup, so ... Are >we saying that the DK-22 + the 2925 + a DK-?? eyecup will >work? Which eyecup? I think the DK-3 works with the FM2 & >FM3A, does that mean it's the right one for this?
Dk 22 is compatible with d600. Fm2 eyepieces have 19mm thread that connects them to the dk22. If you want an eyecup as well then you need to add a third component. I think it's the dk3 but will check. Hth