Steve Allen , Sep 22, 2003; 01:56 a.m.
Only on the xi lenses & xi bodies (in other words even if you have an xi power zoom, if you have a newer body it won't power zoom). It was a useless feature that Minolta moved away from. Minolta hasn't made a power zoom in many years.
I recommend the 100-300 APO (if you can afford it) its sharp, light and small. I don't have experience with the 75-300 but I'm sure its not as sharp (based on cost only and the lack of the APO (brings all colors to the same focus) feature). I've recently seen the 100-300 APO for $250 in ebay.