stuck in Av mode

drfilgd · 12-17-2011, 05:20 PM

my camera LCD says it is in Av mode, whether in Green, P, Sv, Tv. Av, or Tav modes on the mode button. M, B, and X modes on the button shows up correctly in the LCD. I am using the Pentax 28-105 Power Zoom lens. thanks for any help.

RioRico · 12-17-2011, 05:29 PM

Which camera? I'm not familiar with that lens -- does it have an M/A switch? Being "stuck in Av mode" usually happens when a non-A-type manual lens is mounted. Does this happen with any other AF or A-type lenses?

HockeyDad · 12-17-2011, 05:39 PM

Similiar thread can be found here...

It could be that the Camera "thinks" you have a manual lens on. Maybe cleaning the contacts will help.

RioRico · 12-17-2011, 05:49 PM

Originally posted by HockeyDad

It could be that the Camera "thinks" you have a manual lens on. Maybe cleaning the contacts will help.

I was going to suggest that, but then there would be a flashing F-- on the LCD screen too. OP has this same question in another thread -- is using a K20D. If the problem manifests with other lenses, it could be a camera problem. If it's only this lens, then it may be time for another lens. Or a good cleaning.

Davidw0815 · 12-17-2011, 06:06 PM

Did you set the aperture ring to "A"?

drfilgd · 12-17-2011, 08:56 PM

the camera is K20D. then lens is a Pentax FA lens, no m/af switch. I will try everybodies suggestions. thanks for the help...OOOOPS, just realized I had taken it off "A" button, now its not "stuck on Av"

drfilgd · 12-17-2011, 09:07 PM

thx, you were right, I had taken it off "A" locked

mythguy9 · 06-12-2013, 02:52 AM

Originally posted by RioRico

Which camera? I'm not familiar with that lens -- does it have an M/A switch? Being "stuck in Av mode" usually happens when a non-A-type manual lens is mounted. Does this happen with any other AF or A-type lenses?

Hi RioRico, can you please kindly confirm this? I mounted a M lens and the same thing happened, i.e. stuck in Av mode for P, Sv, Tv, and TAv. It's kinda worrisome so I just wanna confirm that this always happens to M lenses (I don't have auto lens to test...

)

Ben_Edict · 06-14-2013, 09:34 AM

Originally posted by mythguy9

Hi RioRico, can you please kindly confirm this? I mounted a M lens and the same thing happened, i.e. stuck in Av mode for P, Sv, Tv, and TAv. It's kinda worrisome so I just wanna confirm that this always happens to M lenses (I don't have auto lens to test...

)

Yes, manual lenses can only be used in Av (but the aperture will always stay open, during picture taking) or M. In M the aperture is stepped down correctly during expsoure and you can have a kind of semi-Automatic, when you push the Green Button, which takes an expsoure reading and sets the correct time for the aperture you have chosen.

Ben

Adam · 06-14-2013, 11:00 AM

Originally posted by mythguy9

Hi RioRico, can you please kindly confirm this? I mounted a M lens and the same thing happened, i.e. stuck in Av mode for P, Sv, Tv, and TAv. It's kinda worrisome so I just wanna confirm that this always happens to M lenses (I don't have auto lens to test...

)

This article might be of help:
https://www.pentaxforums.com/forums/pentax-lens-articles/110657-how-use-meter...k-x-k-7-a.html

12-17-2011, 05:20 PM	#1
drfilgd Junior Member Join Date: Dec 2011 Posts: 40	stuck in Av mode my camera LCD says it is in Av mode, whether in Green, P, Sv, Tv. Av, or Tav modes on the mode button. M, B, and X modes on the button shows up correctly in the LCD. I am using the Pentax 28-105 Power Zoom lens. thanks for any help.

06-14-2013, 11:00 AM	#10
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,609	Originally posted by mythguy9 Hi RioRico, can you please kindly confirm this? I mounted a M lens and the same thing happened, i.e. stuck in Av mode for P, Sv, Tv, and TAv. It's kinda worrisome so I just wanna confirm that this always happens to M lenses (I don't have auto lens to test... ) This article might be of help: https://www.pentaxforums.com/forums/pentax-lens-articles/110657-how-use-meter...k-x-k-7-a.html Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

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12-17-2011, 05:29 PM	#2
RioRico Veteran Member Join Date: Jun 2008 Location: Limbo, California Posts: 11,263	Which camera? I'm not familiar with that lens -- does it have an M/A switch? Being "stuck in Av mode" usually happens when a non-A-type manual lens is mounted. Does this happen with any other AF or A-type lenses?

12-17-2011, 05:39 PM	#3
HockeyDad Veteran Member Join Date: Mar 2011 Location: Michigan Posts: 482	Similiar thread can be found here... It could be that the Camera "thinks" you have a manual lens on. Maybe cleaning the contacts will help.

12-17-2011, 05:49 PM	#4
RioRico Veteran Member Join Date: Jun 2008 Location: Limbo, California Posts: 11,263	Originally posted by HockeyDad It could be that the Camera "thinks" you have a manual lens on. Maybe cleaning the contacts will help. I was going to suggest that, but then there would be a flashing F-- on the LCD screen too. OP has this same question in another thread -- is using a K20D. If the problem manifests with other lenses, it could be a camera problem. If it's only this lens, then it may be time for another lens. Or a good cleaning.

12-17-2011, 06:06 PM	#5
Davidw0815 Veteran Member Join Date: Jul 2011 Photos: Gallery Posts: 437	Did you set the aperture ring to "A"?

12-17-2011, 08:56 PM	#6
drfilgd Junior Member Join Date: Dec 2011 Posts: 40 Original Poster	the camera is K20D. then lens is a Pentax FA lens, no m/af switch. I will try everybodies suggestions. thanks for the help...OOOOPS, just realized I had taken it off "A" button, now its not "stuck on Av"

12-17-2011, 09:07 PM	#7
drfilgd Junior Member Join Date: Dec 2011 Posts: 40 Original Poster	thx, you were right, I had taken it off "A" locked

06-12-2013, 02:52 AM	#8
mythguy9 Senior Member Join Date: Jun 2012 Photos: Albums Posts: 276	Originally posted by RioRico Which camera? I'm not familiar with that lens -- does it have an M/A switch? Being "stuck in Av mode" usually happens when a non-A-type manual lens is mounted. Does this happen with any other AF or A-type lenses? Hi RioRico, can you please kindly confirm this? I mounted a M lens and the same thing happened, i.e. stuck in Av mode for P, Sv, Tv, and TAv. It's kinda worrisome so I just wanna confirm that this always happens to M lenses (I don't have auto lens to test... )

06-14-2013, 09:34 AM	#9
Ben_Edict Veteran Member Join Date: Jul 2007 Location: SouthWest "Regio" Photos: Albums Posts: 3,309	Originally posted by mythguy9 Hi RioRico, can you please kindly confirm this? I mounted a M lens and the same thing happened, i.e. stuck in Av mode for P, Sv, Tv, and TAv. It's kinda worrisome so I just wanna confirm that this always happens to M lenses (I don't have auto lens to test... ) Yes, manual lenses can only be used in Av (but the aperture will always stay open, during picture taking) or M. In M the aperture is stepped down correctly during expsoure and you can have a kind of semi-Automatic, when you push the Green Button, which takes an expsoure reading and sets the correct time for the aperture you have chosen. Ben