Author Topic: 28-85mm f/3.5-4.5 super soft or just bad example?  (Read 1924 times)

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Offline yakky

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28-85mm f/3.5-4.5 super soft or just bad example?
« on: March 27, 2009, 02:18:41 PM »
Long time lurker, first time poster.

I recently picked up a Minolta 28-85mm f/3.5-4.5 lens from B&H.  By all appearances it is in excellent condition, however after taking some sample pics, it seems really soft.  Attached is a comparison of some lenses I have, all shot at f8 and as close to 50mm as I could get.  I took numerous shots, none of them are sharp from this lens.



Is this just a really soft lens or did I get a bad example?

Offline LyleG

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Re: 28-85mm f/3.5-4.5 super soft or just bad example?
« Reply #1 on: March 27, 2009, 06:35:41 PM »
I had a 28-85 and found it fairly soft as well. It took nice pics, they were never tack sharp regardless of what I did.
Sigma 10-20 - CZ16-80 - Tamron 70-200/2.8 - Minolta 28/2.8 - Sony 50/1.8 - Kenko teleplus 300 1.4 TC - extension tubes - HVL42 (x2)
http://www.flickr.com/photos/lylegenykphotography/

Offline yakky

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Re: 28-85mm f/3.5-4.5 super soft or just bad example?
« Reply #2 on: March 28, 2009, 01:51:37 AM »
Wow, ok I feel a bit dumb.  After reading some more reviews and knowing that something was fishy, I started to suspect I was doing something wrong.  I was.  Found this amazing chart:

http://www.geocities.com/royanddee/lens_test_results_mtf50.htm

According to that, the 28-85 has more resolution than the 50 F1.7 prime.  And guess what, it does.  Reshot at 28mm and the difference is STUNNING.



Like they say, a good photog knows his equipment.  I now know the sweet spot of this amazing little lens!