#17. "RE: True..." In response to In response to 16 Sat 10-Mar-12 12:27 PM by briantilley
>The magnification will still be .70, as opposed to .93 in DX >(same lens). 25% smaller.
To make sure we are on the same page, let's look at the D3s, which I already own. Its viewfinder magnification is the same as the D800 at 0.7x, and it does not change when you engage DX Crop Mode. All that happens is that the outer area of the viewfinder outside the DX frame is greyed out. The part that's left in the centre still looks exactly the same - it doesn't get magnified.
I assume the D800 will work the same, but haven't tried it myself.
Compare that with the D7000 or D300s, both of which have 0.94x magnification viewfinders to compensate (partially) for the smaller size of the DX focusing screen.