Sony A7... Dogs
Discussion
Hi all,
I've recently acquired a Sony A7 with the kit 28-70mm lens and to be frank, i'm having a concern regarding the AF-C and tracking subjects. Whenever I use AF-C it produces pretty horrifically out of focus shots, even in bright sunlight (or high ISO) with little concern to shutter speed (everything from 1/10 - 1/2000 was the same). When things get static it's wonderfully sharp.
Any ideas, tips or steers?
I've recently acquired a Sony A7 with the kit 28-70mm lens and to be frank, i'm having a concern regarding the AF-C and tracking subjects. Whenever I use AF-C it produces pretty horrifically out of focus shots, even in bright sunlight (or high ISO) with little concern to shutter speed (everything from 1/10 - 1/2000 was the same). When things get static it's wonderfully sharp.
Any ideas, tips or steers?
Shutter speed won't affect focus, only motion blur. Bright light/contrasty subjects will help the system find focus but high ISO won't.
To the variables that matter - AF systems can be complex - check that you're using the right focus points and the right focusing mode (whatever they are on an A7). Read the manual for this. Also make sure your lens can respond fast enough.
It may also be that the speed of the dog is too great for your system to cope anyway!
To the variables that matter - AF systems can be complex - check that you're using the right focus points and the right focusing mode (whatever they are on an A7). Read the manual for this. Also make sure your lens can respond fast enough.
It may also be that the speed of the dog is too great for your system to cope anyway!
TheRainMaker's setup should work.
I've got the A7rii so your results may vary slightly, but there is an EVF setting so you can see the actual focus points used in real time. It looks like a lot of small green squares 'flowing' over the area in focus. If not already, try using that as it may help diagnose what's going on.
When doing that I have to say that the object tracking is pretty bloody good, as good as I've seen. Apart from the A9...
The other scenario is what you are shooting may be difficult for *any* camera/lens combo to consistently keep up with. So nothing you are doing wrong as such.
I've got the A7rii so your results may vary slightly, but there is an EVF setting so you can see the actual focus points used in real time. It looks like a lot of small green squares 'flowing' over the area in focus. If not already, try using that as it may help diagnose what's going on.
When doing that I have to say that the object tracking is pretty bloody good, as good as I've seen. Apart from the A9...
The other scenario is what you are shooting may be difficult for *any* camera/lens combo to consistently keep up with. So nothing you are doing wrong as such.
JustinP1 said:
I've got the A7rii so your results may vary slightly, but there is an EVF setting so you can see the actual focus points used in real time. It looks like a lot of small green squares 'flowing' over the area in focus. If not already, try using that as it may help diagnose what's going on.
The A7 just shows a green box around the whole subject (when it's locked on), the small green squares are on the later models. TheRainMaker said:
JustinP1 said:
I've got the A7rii so your results may vary slightly, but there is an EVF setting so you can see the actual focus points used in real time. It looks like a lot of small green squares 'flowing' over the area in focus. If not already, try using that as it may help diagnose what's going on.
The A7 just shows a green box around the whole subject (when it's locked on), the small green squares are on the later models. Maybe I was confused with the A7 mkII as I considered that before the r.
Either way though, the autofocus is very good and should be able to 'keep up' unless it would be unrealistic for it to do so in the circumstances.
OP, is it possible to try another lens to eradicate that factor from the equation?
Hi all,
Sorry for the delay.
Here's a batch of the offending images. I've since whacked on a Canon EF 50mm and run it with MF to better success (using the green flowing focus indicators). With the kit lense i'm watching the flowing box track the head and then seemingly slowly lose focus tracking. I think coming from a 7D has spoiled me somewhat.
DSC00298 by Simon Cox, on Flickr
DSC00295 by Simon Cox, on Flickr
And some successful examples;
_DSC0521 by Simon Cox, on Flickr
Muddy Paws = Happy Dog by Simon Cox, on Flickr
Sorry for the delay.
Here's a batch of the offending images. I've since whacked on a Canon EF 50mm and run it with MF to better success (using the green flowing focus indicators). With the kit lense i'm watching the flowing box track the head and then seemingly slowly lose focus tracking. I think coming from a 7D has spoiled me somewhat.
DSC00298 by Simon Cox, on FlickrDSC00295 by Simon Cox, on FlickrAnd some successful examples;
_DSC0521 by Simon Cox, on FlickrMuddy Paws = Happy Dog by Simon Cox, on FlickrSo i put on the cheap as chips 50mm F1.8 prime from my 7D and stuck to MF - the 'point of focus sweep' is brilliant IMO.
Got these yesterday... much improvement.
GSRE 28 May 17 by Simon Cox, on Flickr
GSRE 28 May 17 by Simon Cox, on Flickr
GSRE 28 May 17 by Simon Cox, on Flickr
GSRE 28 May 17 by Simon Cox, on Flickr
GSRE 28 May 17 by Simon Cox, on Flickr
I'm getting more confident with MF - it's always something i've shied away from prior. Now i'm not sure why....
Got these yesterday... much improvement.
GSRE 28 May 17 by Simon Cox, on FlickrGSRE 28 May 17 by Simon Cox, on FlickrGSRE 28 May 17 by Simon Cox, on FlickrGSRE 28 May 17 by Simon Cox, on FlickrGSRE 28 May 17 by Simon Cox, on FlickrI'm getting more confident with MF - it's always something i've shied away from prior. Now i'm not sure why....
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