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03-05-2014, 03:52 PM   #16
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Thank you for the replies everyone, and thank you for the link MSL.

I will try this technique for a bit!

03-05-2014, 07:56 PM   #17
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QuoteOriginally posted by MSL Quote
A solution to that con for some camera bodies is to set USER modes that use the shutter for focusing.
QuoteOriginally posted by lister6520 Quote
I just turn it to green mode in such situations, among other things it enables the shutter half press focus.
That's awesome information..... thanks
03-05-2014, 08:10 PM   #18
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QuoteOriginally posted by lister6520 Quote
I just turn it to green mode in such situations, among other things it enables the shutter half press focus.
Does not work on K10D. I don't know about which later model changed this.
03-07-2014, 11:34 AM   #19
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QuoteOriginally posted by johnyates Quote
It's great too for catch in focus with manual lenses. Hold down the AF button, depress shutter release and rotate lens barrel. The shutter fires when you're in focus.
Interesting! How can i delay shutter until target is in focus?

03-07-2014, 12:35 PM   #20
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QuoteOriginally posted by LarsW Quote
Interesting! How can i delay shutter until target is in focus?
Make sure CIF is enabled in the menu.
Hold down the AF button.
Then, depress and hold shutter release. Nothing happens 'til focus is achieved.
03-07-2014, 03:32 PM   #21
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Thanks johnyates i'll try this with manual lenses
03-08-2014, 10:56 AM   #22
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QuoteOriginally posted by LarsW Quote
Thanks johnyates i'll try this with manual lenses
Just be aware that it might not work if you use an m42 lens with a flange-less adapter, or a lens with painted base, even if they're manual. The base must short the data pin (I think it is) in order for CIF to work. You can use some aluminium foil to short the pin (just be careful not to get loose bits of it into your camera). That should enable you to use CIF with AF lenses as well. Of course, it's also possible to remove the paint from the lens base, but I don't like butchering my lenses.

Back on topic

The only minor issue I have with using back button AF is that it feels a bit clumsy holding the button on the few occasions I need to use AF-C for tracking things. And the biggest bonus is that Quick Shift now is properly useful!

There is no way I will go back to shutter button AF.

Last edited by savoche; 03-08-2014 at 10:58 AM. Reason: typo
03-08-2014, 11:04 AM   #23
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With the K10D and presumably the K20D, the [AF] button is located perfectly for me. I only need to roll my thumb 1/4 turn to the left to depress the button while the thumb is on the thumb rest. I can even do it without thinking while using the Pentax hand strap tightened right up. I'm not sure of the location on other models.

03-10-2014, 02:55 AM   #24
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On another thread the question was asked, "why can't the AF button wake the camera if it has gone to sleep?" and this is the only drawback I have with using the AF button instead of half press on shutter release. If the camera is asleep and a shot is composed, AF button pressed, nothing! My first reaction is to take camera from eye to confirm that I was pressing the AF button, mutter a little, half press shutter release to wake camera, then recompose, AF, and shoot. I wouldn't say that I have lost any shots (I don't do sports and rarely do birds in flight) but it is annoying.
03-10-2014, 09:50 AM   #25
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Shutter button AF drives me crazy. BBAF 4 life!
03-10-2014, 12:25 PM   #26
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I tried to get into BBF with the K5 and one other con was using it on tripod with the self timer to get myself on the photo of course. The shutter press to activate the self timer did not activate the focus. So I was a but blurry, but have learnt to first focus with the BB and then use the self timer
03-11-2014, 03:07 AM   #27
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QuoteOriginally posted by filoxophy Quote
Shutter button AF drives me crazy. BBAF 4 life!

PentaxForum should have that Quote Printed on a T-Shirt = " BBAF4LIFE"
03-11-2014, 03:10 AM   #28
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Definitely back button AF for the K-3, but I find the positioning of the button awkward on the K-5 so I still prefer the half-button-press method.
03-11-2014, 03:40 AM   #29
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I like BBAF, but I have a K-50, so there is no dedicated AF button - just AF/AE-L. If I use BBAF I lose AE-L. Without referring to my manual, I don't think another button can be programmed for AE-L; is there a workaround?
03-11-2014, 07:57 PM   #30
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Bbaf4eva
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