Minolta AF 75-300mm F4.5-5.6 A-mount lens review by glencraig59
|glencraig59#8028 date: Sep-28-2010|
flare control: 4
|ownership:||I own this lens|
|compared to:||Min 100-300 APO D; Min 70-210 BC|
|price paid:||169 USD used|
|positive:||Good range, well-built.|
|negative:||Need to stop down to f/8 to be tack sharp.|
|comment:||I tested for sharpness as follows: took a complete set of pictures with a tripod at all focal lengths and apertures and looked at an area 100% on screen one-third in from left and bottom edges.|
Compared to the beer can, this big beer can is not quite as sharp wide open, though still acceptable, except at the long end, 250-300 mm. By "acceptable" I mean only some very slight softness at 100%; I could still read the fine print in my images. Pictures were tack sharp by f/8 at all focal lengths from 75-210 mm, except 135 mm, which was tack sharp by f/6.3.
At 250 and above, my copy of this lens is not usable wide open, and shows a severe color shift as well as very soft images. The 100-300 APO is better at this end with both color and wide-open sharpness. At 250 mm, I had to stop down to f/11 to make it tack sharp, but by 300 mm this was back to f/8.
In sum: from 75-200, usable wide open, better one stop down, and tack sharp by f/8; 250-300, not usable wide open, stop down to at least f/8 for good results.