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12-19-2007, 09:29 PM   #1
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Pentax-M 28mm f2.8...

I just won this on eBay for $50. Why is the f2.8 version rated lower than the f3.5 version? I'd assume it would be the other way around because the f2.8 is actually a faster lens. Am I wrong?

12-19-2007, 10:07 PM   #2
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QuoteOriginally posted by tux08902 Quote
I just won this on eBay for $50. Why is the f2.8 version rated lower than the f3.5 version? I'd assume it would be the other way around because the f2.8 is actually a faster lens. Am I wrong?
The image quality of the 3.5 is superior. I purchased one brand new from London Drugs in Aldergrove BC for a whole $109.95 in the mid 70's. Almost no distortion, the "Pentax Look" - great lens. My daughter in law has it on permanent loan, along with my ME and an AF280T flash. I don't think I'll ever get it back.
12-19-2007, 11:47 PM   #3
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I have both the 3.5 and the 2.8, and I concur the 3.5 is an outstanding lens. Even my wife, who sees hundreds of my photographs every month commented on the clarity and color saturation from a roll I took with the 3.5 when I first acquired it a few months ago ( at a thrift store for $15.00. ) The 2.8 is a nice lens, but there is something almost magical about the 3.5. Note I have 28mm manual focus Nikon, Yashica, and Canon lens to compare these Pentax 28s with, and the 3.5 surpases all others.
12-20-2007, 03:18 AM   #4
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Note that there are two different f3.5 lenses, the M and the K.

Here is a lens evolution diagramm of all the 28mm lenses:



12-20-2007, 04:01 AM   #5
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Great info. Thanks blende8
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