>Hi, Roger. > >In your example, the bird (and its eye!) will not change in >size in the D700 or D800 viewfinder when you switch the camera >to DX crop mode. The crop mode is just masking out the edges >of the viewfinder, not making the central area larger.
It will appear larger in the frame or the print. That is where the confusion comes from. This is one myth in photography that needs to be nailed. Unfortunately the biggest sinners with respect to the myth tend to be magazines who like to differentiate for the sake of camera sales.