Obtaining correct focus in low-light

[wgerrard]

It seems that people tend to focus first, then move around to compose. Wide open... you need to compose first, focus, then make sure you don't change the plane of focus by recomposing.

Seconded. It's easy to move or sway a few inches even when you think you are holding still.

Your own ability to see in low light has a lot to do with it, too.