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Thread started 22 Apr 2012 (Sunday) 16:53
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7D Action Focus Questions

Beanie's ­ Dad
Senior Member
581 posts
Joined Nov 2008
Location: Irvine, Scotland
Apr 23, 2012 16:17 as a reply to  @ post 14314197 |  #16

I shoot dogs quite a lot and it's amazing how it can be really easy to nail the focus with some dogs, and really really difficult with others. Markings & size play a big part; for example collies are typically very easy (they're larger, and their faces are often perfect high contrast targets for the AF) while smaller dogs with softer/sparser markings, like yours, can be tougher. Light quality is another huge factor - an overcast day doesn't help the AF one bit, and a backdrop that competes for the AF's attention isn't going to help either.

With a small agile dog like yours I'd use single point only, as noahcomet suggested, and just work really hard at keeping that point right on the dog. In this case, the dog's head has the most contrast so that would be my target of choice.

Also take *great* care to make sure the AF point is bang on target as you engage tracking. It can be very easy to get a bad initial lock if the target is quite small in the viewfinder, so sometimes it's better to wait until the target is a little closer (or zoom in closer) before starting the track. Also be prepared to disengage/re-engage tracking any time your dog changes direction or presents a different aspect to you and the AF (e.g. as the dog turns). Rear button AF is a big help here, at least for me.

Consider adjusting tracking sensitivity too. I've tried the five different positions but I keep coming back to one notch up from slowest, even when there are no intervening objects to worry about.

5DIII, 5DII, EF24-105, EF 70-200 f4L IS, EF 85 1.8, "Sigmalux" 50 1.4, EF 35 f2, EF17-40 f4L

208 posts
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Joined Mar 2010
Apr 30, 2012 14:51 as a reply to  @ Beanie's Dad's post |  #17

yes, use 1/500 sec shutter to start for fast moving objects. I shoot all sports this way.

Also as agreed by others use single point focus (not single point spot focus)


also the proper setting in camera would make sense if you get into the AF menu case settings there are specific settings for diff variables like
Versatile multipurpose
track subject ignoring obstacles
instantly focus on things entering the frame
objects that accelerate and decelerate quickly
erratic subjects moving quickly any direction
subjects that change speed and move erratically (probably your dog! :D)

1DMIII | 5DIII March 22nd 2012 | 70-200 2.8L II | 85L II | 24L II | 40 F2.8

1,204 posts
Gallery: 9 photos
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Joined Nov 2009
Location: Washington MI
Apr 30, 2012 14:58 |  #18

jhayesvw wrote in post #14309713 (external link)
it looks like it locked focus on the bricks.
try bumping the focus just before you shoot.

agreed here, looks like the bricks are more in focus and sharp than the dog.

Jon | JMBPhotography
5D MK II / 5D MK III --- 24L II | 50L | 135L | Canon 85 F/1.8 | 430 EX II/Yongnou 560 Speedlites | Manfrotto 055XPROB Pro Tripod

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7D Action Focus Questions
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