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Old Feb 14, 2007, 8:19 PM   #1
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i recently ran across a Pentax power zoom lens
i dont recall the length, i think 28-80 or there abouts

what is a power zoom lens?
will it work on a ds?
are they any good?

thanks
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Old Feb 14, 2007, 9:55 PM   #2
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They work just fine on a DS, everything but the Powerzoom feature, which will only work on the K10D DSLR, and many film SLR's. A slight twist of the zoom ring zooms the lens in or out and it has some automatic features also, but non of these features will work with a DS.

Tom
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Old Feb 14, 2007, 10:17 PM   #3
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thanks

the one i saw was on a camera, but i couldnt work out how it worked

can it be zoomed without the power zoom

i tried finding info on the net but couldnt find much
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Old Feb 14, 2007, 11:24 PM   #4
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There is a clutch on the zoom ring, move it one way to zoom normally and the other to power zoom.

Tom
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Old Feb 15, 2007, 11:05 PM   #5
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ennacac wrote:
Quote:
They work just fine on a DS, everything but the Powerzoom feature, which will only work on the K10D DSLR, and many film SLR's. A slight twist of the zoom ring zooms the lens in or out and it has some automatic features also, but non of these features will work with a DS.

Tom
I still don't get the need or cost justification for it.... even with severe arthritis how hard is it to more PRECISELY (and likely quicker) twist a manual zoom ring???

Unless maybe you want a totally hands off remotely controled camera.
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Old Feb 16, 2007, 1:15 AM   #6
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It is much faster than hand zooming and has nothing to do with easier or harder to move the zoom. It will also follow a subject and keep then the same size in the viewfinder no matter how close or far away they get.

Tom
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Old Feb 16, 2007, 5:03 PM   #7
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Well thats interesting, no one had mentioned that aspect yet.... wonder how it does that. (sub dist tracking) or is that a function of camera attached to.... don't rememebr in my at least scanning of the 10Dmanual.
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Old Feb 17, 2007, 5:01 PM   #8
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I don't remember, but the feature worked great on my PZ-1P.

Tom
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