Minolta AF 28-85mm F3.5-4.5 A-mount lens review by sooner

reviewer#2227 date: Apr-29-2007
sharpness: 4
color: 4
build: 5
distortion: 4
flare control: 3
overall: 4
tested on:
  • film camera:Film camera
  • APS-C: 6MP6 MP; 10MP10 MP; 12MP12 MP; 14MP14 MP; 16MP16 MP; 20MP20 MP; 24MP24 MP
  • full frame: 12MP12 MP; 24MP24 MP; 36MP36 MP; 42MP42 MP; 61MP61 MP
ownership:I own this lens
compared to:KM 18-70, M 35-70, M 35-105, M 50-1.7, Sigma 28-200, Baby Beer Can, M 75-300 (silver)
price paid:
missing
positive:Sharp at all focal lengths at f/8.
negative:I prefer the macro of the 35-70.
comment:I have tested this lens, and those listed above, using the Koren, 2003, (5mm) test charts to determine the resolution based on MTF-50. The following information is based on results from two of the sine-wave, test, strips; one horizontal near the center of the frame, and the other, diagonal, very close to the corner of the frame. The tests were made with a KM5D, hand held, image stabilization β€œon”, ISO 100, in bright sunlight so that the shutter speed was quick enough to satisfy the reciprocal of the focal length criterion. Results: (focal length/f-stop/lines per inch on an 8” x 12” print at center/ditto-at corner). (85/8/168/97), (85/4.5/94/41), (28/8/210/77), (28/3.5/122/62). My understanding of photo resolution quality is: >150 lpi=excellent, >110 lpi=very good, >80 lpi=good. I believe the corner results represent a pretty severe test since the test strip extended radially, and the region of interest was very near the corner. More details on this and other lenses can be found at:
http://www.geocities.com/royanddee/lens_test_results_mtf50.htm

rating summary

lens image
  • total reviews: 112
  • sharpness: 4.29
  • color: 4.69
  • build: 4.85
  • distortion: 4.16
  • flare control: 3.62
  • overall: 4.32
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