AF button K3ii

Charben · 04-12-2018, 06:40 AM

When using the AF button to focus (back button focusing). do I have to hold the AF button if I want to recompose after I focus.

08amczb · 04-12-2018, 06:56 AM

In general no, you can release it.
If your subject is moving and you set up AF.C, then you may want to keep pressing the AF button. If you release it, the focus distant remain at where it locked.

**jatrax** · 04-12-2018, 08:23 AM

No. When using AF.S once focus is established it stays once you release the button. That is the big advantage of back button focusing. Using the shutter button to focus causes the camera to refocus every time you touch it.

When using AF.C you can focus and release and it will work the same as AF.S but if you hold it down it works as AF.C. For that reason I usually have the camera in AF.C so that if I hold the button down I have AF.C but if I focus and release it functions as AF.S. Best of both worlds. Another advantage of back button focus.

stevebrot · 04-12-2018, 09:31 AM

Originally posted by Charben

When using the AF button to focus (back button focusing). do I have to hold the AF button if I want to recompose after I focus.

It depends on your AF button settings (menu >> record mode 4 >> Button Customization >> AF Button). The default (AF 1) is to enable AF on both shutter half-press the AF button, meaning that if you press the shutter release after the AF button, the camera will focus again. If you change to AF 2, focus will only be done with the back button and focus will be held until you press it again.

Steve

04-12-2018, 06:40 AM	#1
Charben New Member Join Date: Dec 2016 Posts: 12	AF button K3ii When using the AF button to focus (back button focusing). do I have to hold the AF button if I want to recompose after I focus.

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04-12-2018, 06:56 AM	#2
08amczb Veteran Member Join Date: Dec 2013 Posts: 796	In general no, you can release it. If your subject is moving and you set up AF.C, then you may want to keep pressing the AF button. If you release it, the focus distant remain at where it locked.

04-12-2018, 08:23 AM	#3
jatrax Site Supporter Join Date: May 2010 Location: Washington Cascades Photos: Gallery \| Albums Posts: 12,991	No. When using AF.S once focus is established it stays once you release the button. That is the big advantage of back button focusing. Using the shutter button to focus causes the camera to refocus every time you touch it. When using AF.C you can focus and release and it will work the same as AF.S but if you hold it down it works as AF.C. For that reason I usually have the camera in AF.C so that if I hold the button down I have AF.C but if I focus and release it functions as AF.S. Best of both worlds. Another advantage of back button focus.

04-12-2018, 09:31 AM	#4
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Originally posted by Charben When using the AF button to focus (back button focusing). do I have to hold the AF button if I want to recompose after I focus. It depends on your AF button settings (menu >> record mode 4 >> Button Customization >> AF Button). The default (AF 1) is to enable AF on both shutter half-press the AF button, meaning that if you press the shutter release after the AF button, the camera will focus again. If you change to AF 2, focus will only be done with the back button and focus will be held until you press it again. Steve

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