Hey Guys, I desperately wanted the grid lines in the viewfinder so I ordered the focusing screen from an online store and here we go. Now as a disclaimer, I have never done this before nor have I read any instructions on how to do this. I just opened up the D3 and got to work. This is what I did to replace it, this is NOT a howto guide. Just look at what I did and I took a few pics along the way so make your own judgements, K? K.
Ok, there is the box and the insides.
Inside the D3 is a small leaver, you can press down on that and down falls the tray that holds the focusing screen. The tray will come to a rest at the bottom but will not touch the reflex mirror. With the supplied tweasers I took the OEM focusing screen and place it into the little holder that Nikon built into the E-Type box to the right of the new screen. Then take the new focusing screen and put it back in the holder. With the tweesers lift it back into place and it will latch back up.
I had to do this several times. There was quite a lot of dust and it took awhile to blow it all away.
The grid lines are not “On Demand” They are just there. The screen is a lot clearer than the matte of the OEM screen and the lines are very thin, much thinner than the ones in the D200.
I hope this gives insight into how it’s done.