Aperture is not working on k-50

getting back into it · 07-22-2015, 02:39 PM

Just found this forum and it is amazing! My problem: I bought a Pentax K-50 body only from B&H Photo. I planned to use my old K-1000 lenses with it. I have checked youtube and found out how to make the adjustments to the camera to accept the old lenses but the aperture does not change. The viewer just has "F---" and when I move the aperture, nothing changes. Am I doing something wrong or is that just how it is going to be? Appreciate any help. Thanks.

**enoeske** · 07-22-2015, 02:48 PM

Originally posted by getting back into it

Just found this forum and it is amazing! My problem: I bought a Pentax K-50 body only from B&H Photo. I planned to use my old K-1000 lenses with it. I have checked youtube and found out how to make the adjustments to the camera to accept the old lenses but the aperture does not change. The viewer just has "F---" and when I move the aperture, nothing changes. Am I doing something wrong or is that just how it is going to be? Appreciate any help. Thanks.

That's how its gonna be. However, all you have to do is put the camera in M mode and press the green button. It will take a meter reading and set the shutter for you.

**stevebrot** · 07-22-2015, 02:58 PM

Welcome to the Pentax forums!

As noted above, for lenses lacking contacts on the mount (the "A" contacts), you are left with shooting in M mode with stop-down metering. The reason has to do with a "dumbing down" of the auto-focus version of the K-mount sometime in the past such that the body has no coupling to the aperture ring setting.

General directions for non-A-contact K-mount lenses may be found at:

https://www.pentaxforums.com/forums/58-troubleshooting-beginner-help/110658-u...x-dslrs-f.html

Steve

getting back into it · 07-22-2015, 07:51 PM

Thanks for the help. At least now I know I wasn't doing something wrong. Hoping to learn more as time goes by.

**Nakedgun** · 07-23-2015, 06:33 PM

Originally posted by getting back into it

Hoping to learn more as time goes by.

Indeed. Aren't we all?

07-22-2015, 02:39 PM	#1
getting back into it New Member Join Date: Jul 2015 Posts: 6	Aperture is not working on k-50 Just found this forum and it is amazing! My problem: I bought a Pentax K-50 body only from B&H Photo. I planned to use my old K-1000 lenses with it. I have checked youtube and found out how to make the adjustments to the camera to accept the old lenses but the aperture does not change. The viewer just has "F---" and when I move the aperture, nothing changes. Am I doing something wrong or is that just how it is going to be? Appreciate any help. Thanks.

07-22-2015, 07:51 PM	#4
getting back into it New Member Join Date: Jul 2015 Posts: 6 Original Poster	Thanks for the help Thanks for the help. At least now I know I wasn't doing something wrong. Hoping to learn more as time goes by.

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07-22-2015, 02:48 PM	#2
enoeske Site Supporter Join Date: Jul 2009 Location: Surprise, Az Photos: Gallery Posts: 1,925	Originally posted by getting back into it Just found this forum and it is amazing! My problem: I bought a Pentax K-50 body only from B&H Photo. I planned to use my old K-1000 lenses with it. I have checked youtube and found out how to make the adjustments to the camera to accept the old lenses but the aperture does not change. The viewer just has "F---" and when I move the aperture, nothing changes. Am I doing something wrong or is that just how it is going to be? Appreciate any help. Thanks. That's how its gonna be. However, all you have to do is put the camera in M mode and press the green button. It will take a meter reading and set the shutter for you.

07-22-2015, 02:58 PM	#3
stevebrot Site Supporter Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 27,445	Welcome to the Pentax forums! As noted above, for lenses lacking contacts on the mount (the "A" contacts), you are left with shooting in M mode with stop-down metering. The reason has to do with a "dumbing down" of the auto-focus version of the K-mount sometime in the past such that the body has no coupling to the aperture ring setting. General directions for non-A-contact K-mount lenses may be found at: https://www.pentaxforums.com/forums/58-troubleshooting-beginner-help/110658-u...x-dslrs-f.html Steve

07-23-2015, 06:33 PM	#5
Nakedgun Site Supporter Join Date: Apr 2014 Location: Southwest Posts: 577	Originally posted by getting back into it Hoping to learn more as time goes by. Indeed. Aren't we all?