I'm going to print some photos for an exhibition at
50x70 cm (or maybe
40x46 cm). My photos are taken with a Nikon D7000, 18-105 lens which has a slightly wider crop (
906x400 if I scale it, keeping the ratio). I understand that considering a print that should fit a standard frame, the aspect ratio should match; however it's usually the case that you end up cutting some millimeters from each side of the print to fit it into the frame or MDF, whatever.
I googled and searched the questions here and this was the closest I could get: What and how to crop? I did check all answers but there's just some information about the cropping aspect ratio and it doesn't quite explain the issue in my question.
So, shall I always stick with
800x600 [ratio] crops if I'm printing a standard size image, not a panorama nor a square?
P.S. I just updated my post, as I mean 4:3 ratio, but I also think I'm pretty much confused on how to prepare a photo for printing... Sorry for the confusion anyways.