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**Rondec** · 07-22-2012, 03:39 AM

Originally posted by rawr

Isn't that what focus and compose using centre spot AF does?
Plus who has time to fiddle with selecting individual AF points out of the 11 you have to choose from?

I do. It isn't like it takes that long. OK button centers it and at most two button pushes more gets you to your auto focus point (I very seldom use the two outermost points, since they aren't cross type anyway). I much prefer this to focus and recompose, since the act of recomposing can shift your focal plane.

Crosshair · 07-22-2012, 04:30 AM

Originally posted by Rondec

I do. It isn't like it takes that long. OK button centers it and at most two button pushes more gets you to your auto focus point (I very seldom use the two outermost points, since they aren't cross type anyway). I much prefer this to focus and recompose, since the act of recomposing can shift your focal plane.

Agree and I do use this a lot too. Sometimes the points don't match where I want to focus and make me spoil the framing. Sadly this is due to lack of sufficient AF points and I revert to MF in such situations.

cmohr · 07-22-2012, 04:43 AM

No No, don't use AF-C and centre spot Focus point, then re-compose, the camera will just refocus on whatever is in the centre spot, so if you focus on something using centre spot, then move your composition to be the way you want it what you wanted to be infocus will not be.

Centre spot and AF-S then recompose, but do watch out when using very shallow DoF, don't move the camera at big angles, this changes the focal plain too much sometimes and you wont have anything you want infocus.

Only other thing for quick shots, Use LV, set it to face recognition, If you had used that setting for that photo, the Face recognition of LV would have locked on his face and locked focus there.

rawr · 07-22-2012, 04:48 AM

Originally posted by Rondec

since the act of recomposing can shift your focal plane.

Can indeed, but depending on the lens, aperture and subject distance. Most vulnerable would be some scenarios of thin DOF - telephoto shooting at close distances, shooting 20 -100mm wide open with fast primes at close to moderate distances where the target is a very very specific point (classically an eye) etc.

I'm pretty sure that the OP's pic would not have have had any focal plane problems as a result of using focus-recompose.

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07-22-2012, 03:39 AM	#31
Rondec Loyal Site Supporter Join Date: Mar 2009 Location: Gladys, Virginia Photos: Gallery Posts: 27,668	Originally posted by rawr Isn't that what focus and compose using centre spot AF does? Plus who has time to fiddle with selecting individual AF points out of the 11 you have to choose from? I do. It isn't like it takes that long. OK button centers it and at most two button pushes more gets you to your auto focus point (I very seldom use the two outermost points, since they aren't cross type anyway). I much prefer this to focus and recompose, since the act of recomposing can shift your focal plane.

07-22-2012, 04:30 AM	#32
Crosshair Veteran Member Join Date: Apr 2012 Location: Istanbul Posts: 332 Original Poster	Originally posted by Rondec I do. It isn't like it takes that long. OK button centers it and at most two button pushes more gets you to your auto focus point (I very seldom use the two outermost points, since they aren't cross type anyway). I much prefer this to focus and recompose, since the act of recomposing can shift your focal plane. Agree and I do use this a lot too. Sometimes the points don't match where I want to focus and make me spoil the framing. Sadly this is due to lack of sufficient AF points and I revert to MF in such situations.

07-22-2012, 04:43 AM	#33
cmohr Pentaxian Join Date: Apr 2011 Location: Brisbane. Australia Photos: Gallery Posts: 1,824	No No, don't use AF-C and centre spot Focus point, then re-compose, the camera will just refocus on whatever is in the centre spot, so if you focus on something using centre spot, then move your composition to be the way you want it what you wanted to be infocus will not be. Centre spot and AF-S then recompose, but do watch out when using very shallow DoF, don't move the camera at big angles, this changes the focal plain too much sometimes and you wont have anything you want infocus. Only other thing for quick shots, Use LV, set it to face recognition, If you had used that setting for that photo, the Face recognition of LV would have locked on his face and locked focus there.

07-22-2012, 04:48 AM	#34
rawr Veteran Member Join Date: Jun 2009 Posts: 11,913	Originally posted by Rondec since the act of recomposing can shift your focal plane. Can indeed, but depending on the lens, aperture and subject distance. Most vulnerable would be some scenarios of thin DOF - telephoto shooting at close distances, shooting 20 -100mm wide open with fast primes at close to moderate distances where the target is a very very specific point (classically an eye) etc. I'm pretty sure that the OP's pic would not have have had any focal plane problems as a result of using focus-recompose.

Yet Another AF Failure From My K-5

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