Hello, everyone. I'm hoping you guys can help me plan a shopping spree. (Well, a little spree.) I used to work professionally in the late 70s-early 80s, when cameras used film and all operation was manual. I recently returned to photography. I bought a Nikon D3200 to “get my feet wet” with digital. I use it with a Tamron 150-600mm zoom to shoot “wildlife” (zoo animals, birds, my cat). No video. I'm ready to buy a second camera.
I like to shoot totally manual (exposure, focus, flash). My single biggest concern is focus. I've read that, as compared to the viewfinder in the D3200, the pentaprism viewfinder in the D7200 is 33% brighter and has higher resolution. It seems like that would translate to a significant “real world” advantage in achieving sharp focus. Does it? An FX camera like the D610 or D750 might be even better, specifically from the perspective of achieving sharp manual focus. Any thoughts?
A secondary concern is low light performance. I would expect to get better low light performance (shooting at higher ISO) with an FX sensor. However, even with the D3200 at ISO 6400, I get some noise, but post-processing with ACR can be incredibly effective in cleaning those images. Any thoughts about low light advantages going to a D7200 or an FX?