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04-01-2009, 04:43 AM   #1
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Pentax-M 28-50mm f/3.5-4.5

There's an obscure one for you. Does anyone have this compact zoom, and could offer an opinion?

04-01-2009, 06:14 AM   #2
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I've got one. Although it isn't a very fast lens, I found it to be pretty sharp and decent IQ all around it's focal range/aperture (well, I didn't try small apertures that would be hurt by diffusion). At least as good if not better than the DA Kit lens, certainly sharper than the DA is when both are wide open at the long end (and a touch faster). It is a very compact zoom though, and has a pretty useful normal(ish) to short tele on digital, although the variable aperture plus stop-down metering is a bit frustrating to deal with. I haven't used the lens a whole lot because I've got plenty of others, but I still want to give it a nice walk-around one day to see how it does on a variety of subjects.

One other thing. Mine seems to suffer from a bit of zoom creep when trying to focus at the wide end of the zoom range. If you sort of pull on the focus ring, then the light pressure will zoom you towards the long end. This can be avoided if you are conscious of what you are doing, but I shoot a lot of primes where that isn't an issue so I am not used to it.

04-01-2009, 06:18 AM   #3
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Thanks, Jim. Do you happen to know, is it larger than the M 24-35 zoom?
04-01-2009, 06:19 AM   #4
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Never mind, got that off of the internet, the 24-35 is quite a bit smaller...


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