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09-13-2012, 12:24 PM   #1
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Back Button Focusing?

Is there a setup on the K5 where you can customize a button to focus (and stay focused even if finger lifted) rather than half-pressing the shutter release?

09-13-2012, 12:32 PM   #2
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See here:
https://www.pentaxforums.com/forums/pentax-k-30/198000-back-button-autofocus-how.html

It's just about the same procedure for the K-5.

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09-13-2012, 12:34 PM   #3
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Yep. Not having the camera in front of me...I think it takes two settings.

Under Button Customization:
1. AF button --> Enable AF
2. Shutter release button pressed halfway --> Off

I *think* that's what you are looking for.

Good luck!

Last edited by s4int; 09-13-2012 at 12:35 PM. Reason: Fixed typo
09-13-2012, 12:40 PM   #4
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Hi GDRoth,

yes. Menu > Camera #5 > Button Customization > AF Button > Enable AF and Shutter Button Half Press > Off
I love it, but it takes some time to get rid of old habits (the half-pressed shutter button).

09-13-2012, 12:43 PM   #5
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very cool..................thanks to you all
09-13-2012, 12:53 PM   #6
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FYI, I keep the shutter button half press set to AF but the AF button set to cancel AF. I love this setup. This allows me to switch between manual and auto focus much quicker than using the dedicated AF/MF switch. This may require quick-shift lenses but I'm not certain as I only have quick-shift DA lenses (and manual focus lenses but they are not applicable in this setup).

Good luck!

Last edited by s4int; 09-13-2012 at 12:54 PM. Reason: Fixed typo
03-21-2018, 03:53 PM   #7
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Iíve set up my K5 for back button. I like the functionality of this, but the AF button is right in my face when using the viewfinder. Can the function be mapped to another button?
03-24-2018, 09:39 AM   #8
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I don't think so... I believe the only programmable button is the button on the left side of lens mount.

QuoteOriginally posted by ChucK20D Quote
Iíve set up my K5 for back button. I like the functionality of this, but the AF button is right in my face when using the viewfinder. Can the function be mapped to another button?


03-24-2018, 10:13 AM   #9
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QuoteOriginally posted by Tan68 Quote
I don't think so... I believe the only programmable button is the button on the left side of lens mount.
Thanks for the reply Tan.
I'll see if I can assign it there...
08-25-2018, 09:22 PM   #10
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If you are coming from Nikon, you'll notice that BBF does not allow trap focus / catch-in-focus on Pentax AF lenses. Only MF lenses can work via trap focus, unless you cover specific pins when mounting your AF lens.
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