Which AF method? Rear or shutter button?

JohnX
Posted 24/07/2012 - 12:24 Link
Olympic torch passed my road yesterday, and I found that in the hustle/bustle/crowds my grab shots suffered from me not having time to focus properly using the rear AF button, compounded by the fact that I was also trying to frame the shots using a zoom lens - 50-135.

So, those of you that find yourselves in fast moving situations, which AF method do you use, please? Rear or shutter button?
Edited by JohnX: 24/07/2012 - 12:27
johnriley
Posted 24/07/2012 - 12:41 Link
Shutter button every time - why make two button presses when one will do?
Best regards, John
ChrisA
Posted 24/07/2012 - 13:00 Link
JohnX wrote:
So, those of you that find yourselves in fast moving situations, which AF method do you use, please? Rear or shutter button?
It depends.

If the camera-to-subject distance is changing all the time, then shutter button.

If it isn't - the subjects are fast moving but in the same place - then rear AF button. That way you don't incur the AF delay after you've focused the first time.
.
Pentax K-3, DA18-135, DA35 F2.4, DA17-70, DA55-300, FA28-200, A50 F1.7, A100 F4 Macro, A400 F5.6, Sigma 10-20 EXDC, 50-500 F4.5-6.3 APO DG OS Samsung flash SEF-54PZF(x2)
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MattMatic
Posted 24/07/2012 - 13:28 Link
For me - rear AF button every time.
That allows for prefocus, manual focus and regular. Even for portraiture it allows for focus-and-reframe

Takes a little while to 'learn', but I've used it for so long I don't even think about it anymore
Matt
http://www.mattmatic.co.uk
(For gallery, tips and links)
Edited by MattMatic: 24/07/2012 - 13:29
Blythman
Posted 24/07/2012 - 13:42 Link
Rear button everytime. Everyone should persevere with it for 2 weeks with AF set to AF-C. Hopefully you'll find that AF-S can be made redundant.

It does take a bit of getting used to. If after giving it a fair trial you don't like, then switch back
Alan


PPG
Flickr
ChrisA
Posted 24/07/2012 - 13:50 Link
Blythman wrote:
It does take a bit of getting used to. If after giving it a fair trial you don't like, then switch back
I had a go like that for a while. Possibly not a long enough go to get properly used to it.

One thing that made me give up sooner than I might have is that I look through the VF with my left eye, which means getting the thumb on the rear AF button in between the camera and my face.
.
Pentax K-3, DA18-135, DA35 F2.4, DA17-70, DA55-300, FA28-200, A50 F1.7, A100 F4 Macro, A400 F5.6, Sigma 10-20 EXDC, 50-500 F4.5-6.3 APO DG OS Samsung flash SEF-54PZF(x2)
.
Blythman
Posted 24/07/2012 - 13:55 Link
I use left eye too Chris. I think I posted something similar to your experience (probably last June) when I switched from the K-x to the K5. Doesn't bother me in the slightest now though.

The thing that does bug me though is the Liveview button being right next to the AF selector button. If I switch from central point to 5 Auto points or vice versa I end up pressing the,live view button too
Alan


PPG
Flickr
Mike-P
Posted 24/07/2012 - 14:23 Link
Rear button/AF-C, best of all worlds.

Took me 4 tries before I finally got used to it and didn't switch back
Edited by Mike-P: 24/07/2012 - 14:24
woodworm
Posted 24/07/2012 - 14:39 Link
Shutter button for me, I did try the rear button for a little while but it didn't offer any advantage.
paulgee20
Posted 24/07/2012 - 15:29 Link
No argument for me, rear button and AFC every time

Paul
K5's (2)both gripped, K10d gripped, Pentax 28-90 f3.5, Sigma 18-250mm, Sigma 150-500mm. Sigma 105mm f/2.8 EX DG Macro, Sigma 10-20 f.4-5.6.EX DC, Hoya 135 f2.8, Take on 28mm f2.8 Pentax AF360 flash, 2 fill in slaves. 30 metre remote release, Rt angle viewfinder, Giotto NOT 3261B Tripod with Manfrotto 808Rd4 ball head, Manfroto 4861RC2 monopoly, shoulder stock, various filters etc, Panasonic SET HBS HD Video cam, Tamrac Explorer 8x backpack and a sore back.....
-------------------------------------------------------
Photography is an index for measuring futility and pride.......

Paul

:wink
http://s743.photobucket.com/home/pg20_photos/index
https://www.flickr.com/photos/pg20
ChrisA
Posted 24/07/2012 - 15:41 Link
Mike-P wrote:
Rear button/AF-C, best of all worlds.

Took me 4 tries before I finally got used to it and didn't switch back
You guys are definitely tempting me to give it another go.

I guess the only thing is that if you hit the release, it always fires?
.
Pentax K-3, DA18-135, DA35 F2.4, DA17-70, DA55-300, FA28-200, A50 F1.7, A100 F4 Macro, A400 F5.6, Sigma 10-20 EXDC, 50-500 F4.5-6.3 APO DG OS Samsung flash SEF-54PZF(x2)
.
Edited by ChrisA: 24/07/2012 - 15:44
Blythman
Posted 24/07/2012 - 15:56 Link
I still use the half press when I need to Chris. It activates metering and it activates the OS on my Sigma 150-500mm.
Alan


PPG
Flickr
ChrisA
Posted 24/07/2012 - 17:10 Link
Blythman wrote:
I still use the half press when I need to Chris. It activates metering and it activates the OS on my Sigma 150-500mm.
Yes, I understand that bit

I just meant that unlike in AF-S, if you press the button all the way down in AF-C it will fire whether it's in focus or not (???) whereas in AF-S unless you change the custom option, it only fires if it thinks it's in focus.
.
Pentax K-3, DA18-135, DA35 F2.4, DA17-70, DA55-300, FA28-200, A50 F1.7, A100 F4 Macro, A400 F5.6, Sigma 10-20 EXDC, 50-500 F4.5-6.3 APO DG OS Samsung flash SEF-54PZF(x2)
.
Edited by ChrisA: 24/07/2012 - 17:11
Aero
Posted 24/07/2012 - 17:22 Link
I would've agreed with John but the positive comments about the rear button make me think it might be worth a try. You learn something every day (well, some days).

Al
wvbarnes
Posted 24/07/2012 - 17:29 Link
Half press shutter and AF - S. I use the quick focus ring to get about there and then fine tune.

I have though been learning this week how to set up an ACTION User mode on my still newish K5 (with continuous High shooting)to replace the lazy Sport dial setting on my old KR. I can't see there is a way to include AFC in this profile. Very little help in the handbook setting these up. I'm doing another for LANDSCAPE and MACRO out of the five available.

Hopefully then I'll have the right setting when some unexpected action requires a different approach

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