Minolta AF 28-85mm F3.5-4.5 A-mount lens review by sooner
 sooner#2227 date: Apr-29-2007 | |
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| sharpness: 4 color: 4 build: 5 distortion: 4 flare control: 3 overall: 4 | tested on:
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| 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 “on”, 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 |
; 10MPrating summary
- total reviews: 112
- sharpness: 4.29
- color: 4.69
- build: 4.85
- distortion: 4.16
- flare control: 3.62
- overall: 4.32