When you have a chance, think you can update your signature and the camera body info in your profile? I can't keep up with all your gear changes so I look there to see what you still use! :wink-new:
Do you notice a big difference in quality of photos between the D750 vs. the D610?

Your cameras must be good because they take beautiful photos. :tongue-new: Lol!
I've thought about it, but it's too much trouble. LOL Besides, there's still stuff queued up to process that may include some of that gear.
Big difference?No.
Difference? Yes. The focus system is, without a doubt, an improvement and I do feel I'm getting sharper photos than ever. That's not to say that in an
all things being equal studio environment you'd be able to tell the difference.
I've been way too busty to do a real, clinical test comparing the two - some sort of double blind experiment where I have two photos taken with identical settings in a controlled environment with little to no adjustments in post. At this point there are too many factors involved unless I do it in ViewNX2, which I'd rather just delete off the computer. I
do not believe that anyone with a D610 who has not been saying, "I like this camera, but I don't love it because I wish it...", should consider upgrading unless they just have money lying around. But, if anyone is planning on making the move to an FX camera I would say that they'll be better served paying the extra 35% for the D750 over the repriced D610.