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11-29-2006, 05:06 PM   #1
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Aperture ring on lenses for Pentax?


Sorry in advance for the dumb question, but since I transitioned into DSLR with Canon (my Pentax arrives tomorrow), I never had to deal aperture ring of the lens - Aperture is controlled at the camera body, none of my lenses for Canon have it...

For example, an AF lens with the aperture ring, and "A" position - that is where the lens would stay for most of the shooting modes and aperture would be controlled via the camera adjustments?

Then for example again, if I was to use an extention tubes for "extreme budget" macro photography (and this would make a lens all manual), I can then move the aperture ring of the lens from "A" position to desired aperture setting to achieve the DOF? And the camera (depending on the mode, Av for example) would select the appropriate shutter speed? Or if in manual mode "M", again, I would set the aperture on the lens ring to where I want it to be and adjust shutter speed according to the meter in the camera?

Thanks in advance for your help!


11-29-2006, 05:14 PM   #2
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if you leave it in A, it operates just like the DA lenses, or your EOS lenses without a ring. Camera handles all the aperature adjustments.

If you use extension tubes - depending on which kind you have:

If it carries the aperature lever thru, you can set your aperature, focus, meter with a button on the camera, then shoot.

If it doesn't carry the aperature lever, then you need to set the aperature and meter, then open it back up to focus (or vise versa - what ever works I guess) -

I'm pretty sure this is how it works.
11-29-2006, 07:32 PM   #3
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Most Pentax lenses these days (FA J and later DA lenses) have no aperture ring. The rest can indeed be left in A mode and controlled from the dials just like canon.
11-29-2006, 09:13 PM   #4
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My two limited lenses have aperture ring and i love them. It is the addictive feel when I move the ring - feeling so solid and i am adjusting something... Improving my dexterity i guess

I made a mistake not knowing this when i first used the lens - all shots are taken wide open at f1.8.... I learnt from mistakes

11-30-2006, 12:42 PM   #5
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Original Poster
Good info guys, thank you very much for your help! Camera is here, charging, will try in few hours to see how this aperture ring works...

12-06-2006, 09:24 PM   #6
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Ha, I didn't know until I recently bought a DA lens that some did not have aperature rings.

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