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10-16-2010, 09:17 AM   #1
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"A" lenses setting on DSLR

When I use a A 50mm f2. What are the setting on the K100D Super body I should use? Do I need to have it on AV or AUTO or?
Dudley

10-16-2010, 09:40 AM   #2
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When using a Pentax-A lens you can use both AUTO and AV. Just make sure that the aperture ring on the lens is set to "A".
10-16-2010, 07:35 PM   #3
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QuoteOriginally posted by Dudley Quote
When I use a A 50mm f2. What are the setting on the K100D Super body I should use? Do I need to have it on AV or AUTO or?
Dudley
With such a lens, you can use all functions and modes of your camera. The only thing you lose is autofocus, but you can use it in catch-in-focus mode. Set the camera on AF-S, press the shutter and focus. When the camera thinks the image is in focus, it will release the shutter.

Or, you can focus on a predetermined point, press the shutter and wait for your subject to move into focus. When it does, the camera will release the shutter.

You will also have to manually set the focal length for SR.

That's the beauty of Pentax.
10-17-2010, 03:12 PM   #4
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QuoteOriginally posted by noblepa Quote
With such a lens, you can use all functions and modes of your camera. The only thing you lose is autofocus, but you can use it in catch-in-focus mode. Set the camera on AF-S, press the shutter and focus. When the camera thinks the image is in focus, it will release the shutter.

Or, you can focus on a predetermined point, press the shutter and wait for your subject to move into focus. When it does, the camera will release the shutter.

You will also have to manually set the focal length for SR.

That's the beauty of Pentax.
What about the same situation/question for Takumar Screwmount later "ES" series lens?
Cheers, Pickles.

10-17-2010, 03:17 PM   #5
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QuoteOriginally posted by pickles Quote
What about the same situation/question for Takumar Screwmount later "ES" series lens?
Cheers, Pickles.
Takumar screwmount lenses can not be used with open aperture metering on a dslr. There is no mechanism on the camera to communicate with the lens or to stop down the aperture automatically. You have to use them with the lens set to manual and the viewfinder gets darker as you stop down. Unlike manual K-mount lenses you can use them in AV mode but the meter requires EV compensation as you stop down, it is only accurate wide open. Catch in focus doesn't work unless you short out a couple of pins as the camera disables AF-S with non A lenses.

https://www.pentaxforums.com/forums/pentax-dslr-discussion/93143-catch-focus-2.html#post951559

Last edited by boriscleto; 10-17-2010 at 03:25 PM.
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