pentax kx- lock focus and re-compose

mtkang · 12-08-2011, 09:40 PM

hi all,

I want to half press and AF on something and recompose while still half press and lock the focus, I can't seem to make it work on pentax k-x by checking all the menu.

I half press, but it will automatically focus hunting if i recompose...

does it able to do what i want?

sterretje · 12-08-2011, 10:03 PM

Do you have AF set to AF.c (continuous AF) or AF.s (single AF) ?

I think AF.c is called differently on the K-x, not sure though.

twitch · 12-08-2011, 10:09 PM

Set your AF on AF-S. If you are on AF-C it will hunt as you recompose.

This is one of the problems back button focusing solves; you can use AF-C but still recompose, and you can recompose take a shot, lift your shutter finger and then take another shot(s) without affecting focus, or having to focus/recompose again. You can use back button focusing on the K-x but you lose AE-L. Luckily on the K-5 you don't give anything up as they are separate buttons.

mtkang · 12-08-2011, 11:32 PM

how to set AF to AF-C or AF-S? i remember i saw the lever on pentax k10d.. but on k-x only MF and AF switch.

sterretje · 12-08-2011, 11:36 PM

Somewhere in the menus

Ah, got it, page 115/116 of the (english) manual

aurele · 12-09-2011, 03:01 AM

(on K-x and K-r) press "Info" / go on the case with either "AFs" or "AFc" or "AFa"

bjake · 12-26-2011, 12:45 AM

Can exposure also be locked by holding the shutter button half way?
Jake

Ecaterin · 12-26-2011, 01:12 AM

Seconding the suggestion to change from half-depressed shutter focus to an AF button approach. I like to keep my camera on 'continuous' focus to capture my moving target kids, and by using the AF button, I'm not limited by waiting for the shutter to do double duty on a moving target. And focus --> recompose is a snap

mtkang · 12-26-2011, 11:47 PM

Thanks! here i share the link of k-x english manual

http://www.pentax.jp/english/support/man-pdf/k-x.pdf

Originally posted by sterretje

Somewhere in the menus

Ah, got it, page 115/116 of the (english) manual

12-08-2011, 09:40 PM	#1
mtkang Forum Member Join Date: Oct 2010 Posts: 65	pentax kx- lock focus and re-compose hi all, I want to half press and AF on something and recompose while still half press and lock the focus, I can't seem to make it work on pentax k-x by checking all the menu. I half press, but it will automatically focus hunting if i recompose... does it able to do what i want?

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12-08-2011, 10:03 PM	#2
sterretje Veteran Member Join Date: Dec 2008 Location: Roodepoort, South Africa Photos: Gallery \| Albums Posts: 3,561	Do you have AF set to AF.c (continuous AF) or AF.s (single AF) ? I think AF.c is called differently on the K-x, not sure though.

12-08-2011, 10:09 PM	#3
twitch Veteran Member Join Date: Nov 2009 Posts: 4,571	Set your AF on AF-S. If you are on AF-C it will hunt as you recompose. This is one of the problems back button focusing solves; you can use AF-C but still recompose, and you can recompose take a shot, lift your shutter finger and then take another shot(s) without affecting focus, or having to focus/recompose again. You can use back button focusing on the K-x but you lose AE-L. Luckily on the K-5 you don't give anything up as they are separate buttons.

12-08-2011, 11:32 PM	#4
mtkang Forum Member Join Date: Oct 2010 Posts: 65 Original Poster	how to set AF to AF-C or AF-S? i remember i saw the lever on pentax k10d.. but on k-x only MF and AF switch.

12-08-2011, 11:36 PM	#5
sterretje Veteran Member Join Date: Dec 2008 Location: Roodepoort, South Africa Photos: Gallery \| Albums Posts: 3,561	Somewhere in the menus Ah, got it, page 115/116 of the (english) manual

12-09-2011, 03:01 AM	#6
aurele Veteran Member Join Date: Jan 2011 Location: Paris, France Photos: Albums Posts: 3,217	(on K-x and K-r) press "Info" / go on the case with either "AFs" or "AFc" or "AFa"

12-26-2011, 12:45 AM	#7
bjake Veteran Member Join Date: Mar 2011 Location: Eastern Kentucky Posts: 416	Can exposure also be locked by holding the shutter button half way? Jake

12-26-2011, 01:12 AM	#8
Ecaterin Veteran Member Join Date: Nov 2009 Location: Seattle Photos: Gallery \| Albums Posts: 723	Seconding the suggestion to change from half-depressed shutter focus to an AF button approach. I like to keep my camera on 'continuous' focus to capture my moving target kids, and by using the AF button, I'm not limited by waiting for the shutter to do double duty on a moving target. And focus --> recompose is a snap

12-26-2011, 11:47 PM	#9
mtkang Forum Member Join Date: Oct 2010 Posts: 65 Original Poster	Thanks! here i share the link of k-x english manual http://www.pentax.jp/english/support/man-pdf/k-x.pdf Originally posted by sterretje Somewhere in the menus Ah, got it, page 115/116 of the (english) manual