I'm doing an art project that requires me to shoot an object behind an empty wooden frame suspended from the ceiling. I wear glasses and when I look through the viewer it looks straight however in my computer it's clear that the perspectives are off; left side is wider than right side, or the top is wider than bottom.
I know there is an easy answer. I just can't figure what is and what I'm doing wrong. I can see the perspective change in my viewer as I move my camera up and down or side to side. But, once I think I've got it dialed in, I look at the image in my computer and I can see it's not.