September 18, 2014, 10:01:04 AM

Author Topic: Single point auto focus  (Read 13727 times)

stessel tank

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Single point auto focus
« on: January 03, 2013, 07:12:56 PM »
Single point auto focus

Just interested how many people use single point a/f most of the time,with the amount of options on all new camera's e.g af expansion/zone af/41 point/61point etc

I find i keep on going back to single point
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Single point auto focus
« on: January 03, 2013, 07:12:56 PM »

paul13walnut5

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Re: Single point auto focus
« Reply #1 on: January 03, 2013, 07:29:22 PM »
Almost always centre point select + aiservo or + oneshot depending on subject.

If exlusively shooting sports may switch to zone.

Mt Spokane Photography

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Re: Single point auto focus
« Reply #2 on: January 03, 2013, 10:18:19 PM »
Almost always centre point select + aiservo or + oneshot depending on subject.

If exlusively shooting sports may switch to zone.

+1

bdunbar79

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Re: Single point auto focus
« Reply #3 on: January 04, 2013, 12:28:13 AM »
I'm a sports photog, and believe it or not, I primarily use single-point AF.  It would be silly to use multiple-point during a basketball or football game and have the camera pick a closer player not involved in the action as focal point.  Just lock on and fire.  If, however, I want to track a moving player, I'll use zone and let it track across the zone, in AI Servo, with AF Case #2.  The only time I have used zone in basketball is with my 1DX and face recognition.  Now that actually works, unless there are a ton of faces in your scene.  Then it's trickier.
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davidchang

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Re: Single point auto focus
« Reply #4 on: January 04, 2013, 12:34:44 AM »
single center point and recompose on 5d2 100%,  on 7d zone + servo most of the time.
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sanj

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Re: Single point auto focus
« Reply #5 on: January 04, 2013, 01:17:14 AM »
My focus point selection varies all the time depending upon the situation.

steen-ag

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Re: Single point auto focus
« Reply #6 on: January 04, 2013, 01:45:32 AM »
Have a 5D-II. Always use singlepoint with helppoints. The recompose

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Re: Single point auto focus
« Reply #6 on: January 04, 2013, 01:45:32 AM »

AlanF

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Re: Single point auto focus
« Reply #7 on: January 04, 2013, 04:05:19 AM »
For static bird photography, always. I use back button focus and AI servo.
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bycostello

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Re: Single point auto focus
« Reply #8 on: January 04, 2013, 04:45:19 AM »
Have a 5D-II. Always use singlepoint with helppoints. The recompose

+1

PavelR

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Re: Single point auto focus
« Reply #9 on: January 04, 2013, 08:20:54 AM »
1D4 - single point (not central and enabled only cross type) without any expansion - all the time - on static and moving subjects.
(Automatic restore of AF point selection on camera orientation change helps a lot.)
« Last Edit: January 04, 2013, 08:48:02 AM by PavelR »

Steve Todd

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Re: Single point auto focus
« Reply #10 on: January 04, 2013, 09:08:09 AM »
I use back button (AF-ON) focusing in AI Servo mode, exclusively for the majority of my shooting (landscape, wildlife/birding, auto racing (NASCAR, NHRA & ALMS), architecture, people, street, travel, etc.).  Using AI Servo and back button focusing, allows me to track moving subjects (holding the button down) independently of shutter release, which I find results in faster and better results (more spot-on focus).  For static or slow moving subjects, I just press the button to gain focus and release it to lock focus.  This works really well in recomposing the shot while maintaining focus and eliminates having to select other than the center AF point or points (expanded or zone).  I also use the Auto AF point selection method in AI Servo on some moving subjects, allowing the initial AF point to continue to track the subject across the frame.  The back button/AI Servo method allows me to switch between one shot and AI Servo instantly, without having to dedicate another button or make changes by changing camera settings.  I was hesitant at first to use this method.  However, now that I ues it full-time, I wonder how I could ever do without it!  My digital bodies are as follows:  EOS-1D X, 1D4, 5D2, 5D.  Film bodies: 2x EOS-1V and a 1n.  My Lenses are:  20-35, 24T/S, 24-105L, 28-300L, 50 1.2L, 70-200 2.8L, 70-300L and 100-400L.  They (lenses) all work excellently using the AF methods I listed above.
Happy shooting!
« Last Edit: January 04, 2013, 09:56:31 AM by Steve Todd »
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FatDaddyJones

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Re: Single point auto focus
« Reply #11 on: January 04, 2013, 09:55:04 AM »
Single point or spot AF probably 90% of the time. What I'd like to know is how many actually change the focus point to compose their image rather than lock on with the center point and recompose. It sure seems a lot faster to me than having to tinker with moving points around.
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Re: Single point auto focus
« Reply #12 on: January 04, 2013, 09:57:21 AM »
90% of my 5D3 shooting is precise Single Point, the Other 10% is AF-expansion + Assist-beam.

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Re: Single point auto focus
« Reply #12 on: January 04, 2013, 09:57:21 AM »

sdsr

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Re: Single point auto focus
« Reply #13 on: January 04, 2013, 10:16:46 AM »
Center point + recompose seems quicker and easier for my purposes.

neuroanatomist

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Re: Single point auto focus
« Reply #14 on: January 04, 2013, 10:29:10 AM »
Single point or spot AF probably 90% of the time. What I'd like to know is how many actually change the focus point to compose their image rather than lock on with the center point and recompose. It sure seems a lot faster to me than having to tinker with moving points around.

Center point + recompose seems quicker and easier for my purposes.

Center point and recompose is certainly faster and easier...and if I'm shooting at f/5.6 with a reasonably distant subject, it's fine because the deeper DoF will mask the backfocus. 

But if you're shooting with a fast prime wide open, focus-recompose is a surefire way to get a backfocused shot.  Some relevant reading: Why Focus-Recompose Sucks.

Personally, I move the AF point around as needed.  I have the default points set off center, and I use orientation-linked AF point to speed things up.  The only time I use an automatic selection mode is in AI Servo for face tracking, where I've already manually selected the starting AF point.
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Re: Single point auto focus
« Reply #14 on: January 04, 2013, 10:29:10 AM »