The AF in the lens refers to the ability of the camera's autofocus ability to be transmitted to the lens to focus it. The older film era lenses pre-dated this technology. The later Minolta lenses, which will look like one Don showed the picture of, will have the AF on them.
These later Minolta lenses as a group are very good lenses, relative to similar grade and size lenses. The Minolta compatability was a big reason why I went with Sony over the competition.
Tamron 70-200 SP AF DI-LD 77mm, Tamron 70-300 58mm, Minolta AF 50, Minolta AF 100 55mm, Sigma 20-70 52mm, Tamron 200-400 77mm, Tamron 28-300 XR DI-LD 62mm, Tamron 28-80 58mm, Minolta AF 70-210 55mm, Tamron 1.4 teleconverter, Sony 75-300 55mm, Sony 18-70 55mm, Sigma EF 530 flash, Canon S3.