Black-chinned hummingbirds and a few notes about autofocus
Autofocus isn't necessarily what you think it is. You can point the lens at your subject and take a picture, but the picture may still not be in focus. How can that be? There are a number of reasons and any one of them can effect your shot, so here is a short list: 1) An object could be in front of the wildlife/landscape you're trying to capture and the autofocus will focus on the nearest object, not necessarily the subject. 2) If the subject (i.e. bird) is on a bush or a tree limb that is moving, and if the shutterspeed isn't fast enough, you'll have motion blur. 3) If you assume you're done after just setting the autofocus, the ISO or shutterspeed can still effect your picture. The camera will take the picture with the settings you've selected, garbage in garbage out. 4) The subject (bird or animal) may be moving, so if the shutterspeed isn't set correctly you'll have motion blur. 5) If your camera has a diopter to adjust the focus for your eyesigh...