Hi there, I'm having a little confusion regarding spherical aberration from some experiments I've been doing with a concave mirror. I've been directing the mirror so that it faces the distance (ie. objects at infinity) and then positioning a flat piece of paper so that an image forms on it. The image, even at is sharpest, remains somewhat blurry which is due to spherical aberration from the mirror, as far as I understand. And yet, when I look at the distance directly in the mirror (without looking at the screen), I see an image that is perfectly crisp. What am I missing here? Thanks in advance, Chris.