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CMG · 07-30-2012, 12:17 AM

I had my FA-31 in my K-5 in Av mode....just decided to rotate the aperture ring to see what it was like....pressed the little release button and rotated it. Is this OK to do? I mean, did I do any damage to the lens by doing this?

paulusje · 07-30-2012, 01:12 AM

Originally posted by CMG

I had my FA-31 in my K-5 in Av mode....just decided to rotate the aperture ring to see what it was like....pressed the little release button and rotated it. Is this OK to do? I mean, did I do any damage to the lens by doing this?

This is perfectly ok

The thing with Av mode is that the camera will measure the exposure with the lens wide open and it will not stop down the diaphragm.
If you want to manually set your aperture by turning the ring you should use M instead of Av. You can use the green button to stop down the lens and get a good exposure.
Please read this for more info: https://www.pentaxforums.com/forums/pentax-lens-articles/110657-how-use-meter...ml#post1140019

Fogel70 · 07-30-2012, 01:27 AM

Using aperture ring is not fully supported on Pentax DSLR, so as long as the aperture ring has A-position its usually much better to use camera to control aperture.

CMG · 07-30-2012, 04:31 PM

Originally posted by Fogel70

Using aperture ring is not fully supported on Pentax DSLR, so as long as the aperture ring has A-position its usually much better to use camera to control aperture.

I was just worried that I might have done some damage to the lens.....

CMG · 07-30-2012, 04:31 PM

Originally posted by paulusje

This is perfectly ok

The thing with Av mode is that the camera will measure the exposure with the lens wide open and it will not stop down the diaphragm.
If you want to manually set your aperture by turning the ring you should use M instead of Av. You can use the green button to stop down the lens and get a good exposure.
Please read this for more info: https://www.pentaxforums.com/forums/pentax-lens-articles/110657-how-use-meter...ml#post1140019

Thank you!

lytrytyr · 07-30-2012, 08:07 PM

Originally posted by CMG

I was just worried that I might have done some damage to the lens.....

Not since you pressed the release button before turning the aperture ring.

07-30-2012, 12:17 AM	#1
CMG Senior Member Join Date: Jul 2012 Location: Seattle, WA Posts: 138	FA Limited Lenses - Manual Aperture I had my FA-31 in my K-5 in Av mode....just decided to rotate the aperture ring to see what it was like....pressed the little release button and rotated it. Is this OK to do? I mean, did I do any damage to the lens by doing this?

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07-30-2012, 01:12 AM	#2
paulusje Senior Member Join Date: Mar 2012 Posts: 134	Originally posted by CMG I had my FA-31 in my K-5 in Av mode....just decided to rotate the aperture ring to see what it was like....pressed the little release button and rotated it. Is this OK to do? I mean, did I do any damage to the lens by doing this? This is perfectly ok The thing with Av mode is that the camera will measure the exposure with the lens wide open and it will not stop down the diaphragm. If you want to manually set your aperture by turning the ring you should use M instead of Av. You can use the green button to stop down the lens and get a good exposure. Please read this for more info: https://www.pentaxforums.com/forums/pentax-lens-articles/110657-how-use-meter...ml#post1140019

07-30-2012, 01:27 AM	#3
Fogel70 Pentaxian Join Date: Sep 2009 Location: Stockholm, Sweden Photos: Albums Posts: 3,062	Using aperture ring is not fully supported on Pentax DSLR, so as long as the aperture ring has A-position its usually much better to use camera to control aperture.

07-30-2012, 04:31 PM	#4
CMG Senior Member Join Date: Jul 2012 Location: Seattle, WA Posts: 138 Original Poster	Originally posted by Fogel70 Using aperture ring is not fully supported on Pentax DSLR, so as long as the aperture ring has A-position its usually much better to use camera to control aperture. I was just worried that I might have done some damage to the lens.....

07-30-2012, 04:31 PM	#5
CMG Senior Member Join Date: Jul 2012 Location: Seattle, WA Posts: 138 Original Poster	Originally posted by paulusje This is perfectly ok The thing with Av mode is that the camera will measure the exposure with the lens wide open and it will not stop down the diaphragm. If you want to manually set your aperture by turning the ring you should use M instead of Av. You can use the green button to stop down the lens and get a good exposure. Please read this for more info: https://www.pentaxforums.com/forums/pentax-lens-articles/110657-how-use-meter...ml#post1140019 Thank you!

07-30-2012, 08:07 PM	#6
lytrytyr Pentaxian Join Date: Nov 2011 Photos: Gallery \| Albums Posts: 4,310	Originally posted by CMG I was just worried that I might have done some damage to the lens..... Not since you pressed the release button before turning the aperture ring.

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