AF button or shutter button, AF-C, AF-S
Posted 01/09/2011 - 22:41
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Always use the back AF button for focussing, never the shutter button. Mostly AF-C now due to the increased control you get by back-button focussing. For Macro, almost always turn off AF and focus manually.
Regards
David
Regards
David
Posted 02/09/2011 - 06:18
Link
I always use the back button for focussing and have the focus function on the shutter release turned off (I cannot remember the last time I used AF on the shutter button at all). I normally have the camera set to AF-S and only use AF-C if the subject is moving a lot. Having said that I do seem to be using AF-C more and more. I also generally use lenses with quickshift so will give a manual tweak when I have to as well.
Posted 02/09/2011 - 08:54
Link
I've used only the AF button for as long as I can remember
For macro, I tend to use the LiveView and AF button on the K5 (because you can move the focus point arbitrarily). It's slow, yes, but gives excellent results as there is no possibility of lens focus adjustment issues.
Matt
For macro, I tend to use the LiveView and AF button on the K5 (because you can move the focus point arbitrarily). It's slow, yes, but gives excellent results as there is no possibility of lens focus adjustment issues.
Matt
http://www.mattmatic.co.uk
(For gallery, tips and links)
(For gallery, tips and links)
Posted 02/09/2011 - 17:30
Link
What are advantages of using the back button to focus as opposed to the shutter button? as i tried it and could not see any benefit in it and you lose exposure lock.
Posted 02/09/2011 - 18:25
Link
It's also useful in that you focus one time, then you can take several shots over the next few seconds without worrying that the camera will try and refocus. That used to drive me crazy when I used shutter button focussing.
Tim
AF - Pentax K5, Sigma 10-20/4-5.6, Tamron 17-50/2.8, Sigma 30/1.4, Sigma 70-200/2.8, Tamron 70-300/4-5.6
MF - Vivitar CF 28/2.8, Tamron AD2 90/2.5, MTO 1000/11
Stuff - Metz 58 AF1, Cactus v4, Nikon SB24, Raynox 150, Sigma 1.4x TC, Sigma 2x TC, Kenko 2x macro TC, Redsnapper 283 tripod, iMac 27”, Macbook Pro 17”, iPad, iPhone 3G
Flickr • Fluidr • PPG • Street • Portfolio site
Feel free to edit any of my posted photos! If I post a photo for critique, I want brutal honesty. If you don't like it, please say so and tell me why!
AF - Pentax K5, Sigma 10-20/4-5.6, Tamron 17-50/2.8, Sigma 30/1.4, Sigma 70-200/2.8, Tamron 70-300/4-5.6
MF - Vivitar CF 28/2.8, Tamron AD2 90/2.5, MTO 1000/11
Stuff - Metz 58 AF1, Cactus v4, Nikon SB24, Raynox 150, Sigma 1.4x TC, Sigma 2x TC, Kenko 2x macro TC, Redsnapper 283 tripod, iMac 27”, Macbook Pro 17”, iPad, iPhone 3G
Flickr • Fluidr • PPG • Street • Portfolio site
Feel free to edit any of my posted photos! If I post a photo for critique, I want brutal honesty. If you don't like it, please say so and tell me why!
Posted 02/09/2011 - 18:37
Link
thoughton wrote:
It's also useful in that you focus one time, then you can take several shots over the next few seconds without worrying that the camera will try and refocus. That used to drive me crazy when I used shutter button focussing.
Indeed or that you see that the focus is just out a bit out so you manual focus and then you press the shutter...
It's also useful in that you focus one time, then you can take several shots over the next few seconds without worrying that the camera will try and refocus. That used to drive me crazy when I used shutter button focussing.
Stefan
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
Posted 02/09/2011 - 20:48
Link
I thought I read somewhere that it helped the image stabilisation as well, speeding it up as the the shutter button turns it off and on everytime it gets pressed and released. (May have been for AF-C) Not tested it myself but sounds possible.
Regards
George
Regards
George
Posted 02/09/2011 - 21:04
Link
carmagw wrote:
I thought I read somewhere that it helped the image stabilisation as well, speeding it up as the the shutter button turns it off and on everytime it gets pressed and released. (May have been for AF-C) Not tested it myself but sounds possible.
I believe it was better to have AF on the shutter release though for the SR.I thought I read somewhere that it helped the image stabilisation as well, speeding it up as the the shutter button turns it off and on everytime it gets pressed and released. (May have been for AF-C) Not tested it myself but sounds possible.
SR takes some time to get ready and since you can immediately press the release fully it means the SR doesn't have the time to get ready.
If you use AF, the camera will wait for the AF to get a lock and then release the shutter, in that time the SR should be ready.
Stefan
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
Posted 02/09/2011 - 21:21
Link
geordie01 wrote:
What are advantages of using the back button to focus as opposed to the shutter button? as i tried it and could not see any benefit in it and you lose exposure lock.
For me it has made AF-S redundant. I just leave it an AF-C all the time. If I get a focus lock on something static I release the button, and recompose if I wish (as I would with AF-S). Or I can continue tracking (as I would with AF-C)What are advantages of using the back button to focus as opposed to the shutter button? as i tried it and could not see any benefit in it and you lose exposure lock.
On the K-5 there is a seperate AE-L button, so you don't lose the ability to lock exposure.
The downside for me is that if I wan't to use catch focus, with my Tamron 90mm f2.5, it doesn't seem to work with the back button. I have to revert to the shutter button
Posted 02/09/2011 - 21:36
Link
Anvh wrote:
SR takes some time to get ready and since you can immediately press the release fully it means the SR doesn't have the time to get ready.
If you use AF, the camera will wait for the AF to get a lock and then release the shutter, in that time the SR should be ready.
I thought the SR worked of the back of a focus lock, hence if the AF button is pressed and SR is active (not before) you could carry on pressing the shutter release and the SR would still be set / active ? Whereas if its (AF) is working off the shutter release the SR resets everytime. I'll try and have a play over the weeked to see if I can see any difference.carmagw wrote:
I thought I read somewhere that it helped the image stabilisation as well, speeding it up as the the shutter button turns it off and on everytime it gets pressed and released. (May have been for AF-C) Not tested it myself but sounds possible.
I believe it was better to have AF on the shutter release though for the SR.I thought I read somewhere that it helped the image stabilisation as well, speeding it up as the the shutter button turns it off and on everytime it gets pressed and released. (May have been for AF-C) Not tested it myself but sounds possible.
SR takes some time to get ready and since you can immediately press the release fully it means the SR doesn't have the time to get ready.
If you use AF, the camera will wait for the AF to get a lock and then release the shutter, in that time the SR should be ready.
Regards
George
Posted 02/09/2011 - 21:39
Link
Thanks folks
you learn some thing every day here.
you learn some thing every day here.
Posted 02/09/2011 - 21:52
Link
carmagw wrote:
I thought the SR worked of the back of a focus lock
Nope it goes on when you half press the shutter release, no matter how or what.I thought the SR worked of the back of a focus lock
So when you're working with the AF on the back it's better to half press the shutter first when you get ready for the shot so that the SR has time to get ready.
With the K5 at least the SR stays on longer when you depress the shutter, it's a lot better now this way.
With the K10D i got quite a few SR errors...
Stefan
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
Posted 02/09/2011 - 22:05
Link
afc ,ad rear button af, revome the af from the shutter button.
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4248 posts
16 years
Blyth,
Northumberland
Most of my photography is wildlife. About 3 months ago I changed from the shutter button to the AF button and set AF to AF-C permanently. Initially I missed focus on quite a few shots, but the keepers have increased since.
I do find this a bit awkward at times for macro, or when I'm lying on the ground taking portraits or landscapes. So guess I'm going to go back to shutter release focus for some circumstances. Interested in what others use.
PPG
Flickr