The Tokina AT-X 340 AF 100-300 F4 is out of production at the moment, I believe. However, used copies can be found in a variety of mounts. There are manual focus mounts as well. The most recent production is called Tokina AT-X 340 AF-II 100-300 F4, however, my post is about the older AF version.
This lens is built like a tank and has a sturdy tripod mount.
The image quality is excellent for a zoom in this price range and the fixed f/4 is a great bonus over many other lenses in this range. It also allows reasonably close focus for a 100-300 zoom lens (under 2m).
There are quite a few very positive reviews of this lens online.
KONICA MINOLTA MAXXUM 7D DSLR
Exposure Time: 0.0080 s (1/125)
Aperture: f/4.0
ISO Equiv.: 400
Whitebalance: Auto
uncropped
sharpened in PSE 5