Auto-focus is a nice tool for many but if you are shooting wildlife in their environment, chances are the camera will miss what you wish to be in focus. I offer the following examples of Goldfinches in a Mulberry tree. They are not on the outside where an auto-focus is likely to target but back inside the tree. These pic are cropped about half so you do not see a lot of foreground OOF branches. Taken with a Sears 80-200/4.0 manual lens. 1. Himself 2. Herself 3. 4.