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?