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Pro and consumer versions including PXW-Z150, PXW-Z100, PXW-X70 / FDR-AX100


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Old March 27th, 2015, 08:20 AM   #1
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slow autofocus?

I find the autofocus on the x70 to be very slow compared to my canon XHA1 . I'm new to Sony and wondering if this is normal? Is there anything I can do to speed it up?

Last edited by Andy Wason; March 27th, 2015 at 01:05 PM. Reason: lacked focus
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Old March 27th, 2015, 04:30 PM   #2
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Re: slow autofocus?

Andy, below is a previous thread already devoted to your issue.

So far I have not read of any fix.

The AX100 has already received a software update that was supposed to improve the autofocus, but based on my experience at a wedding last week it is the same as before the update.

Check out the thread below if you are interested.

Andy, I have owned and really liked a number of Sony cameras and focus has not been an issue before now. Do not judge Sony's entire lineup based on this issue. Autofocus with the AX100 and X70 is very poor and has disappointed a number of users who are Sony fans.

http://www.dvinfo.net/forum/sony-pxw...us-issues.html
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Old March 28th, 2015, 09:39 AM   #3
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Re: slow autofocus?

Thanks Jeff, I read that forum and asked the same question. Nobody spoke about how slow the auto focus is. Do you notice that too?
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Old March 28th, 2015, 12:05 PM   #4
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Re: slow autofocus?

I'm mixed on the X70 autofocus. First, do you mean the actual moving of the lens elements is slow, or it's slow to decide there's a new subject that it needs to change to?

I find that once focused, it seems to "stick" to that focus. So far, for every time I wish it would change and pick up a new subject quicker, there are 2-3 times where I'm glad it doesn't. I'm often grateful that it doesn't get fooled by something I don't want to focus on. I also find the autofocus spot to be pretty small (I wish it had focus area indicator brackets). As a result, if the focus subject is small and distant from the background I have to take extra care to center it.

I posted this earlier to show some test settings, but for what it's worth, from 0:17 to 0:25 is Auto Focus. I wouldn't want it any faster.
1:38 to 1:41 is using Touch Screen Spot Focus for a rack focus effect. I find this second example too fast, and if I had it to do again I'd apply a slight slow motion on that rack focus.

I came to the X70 from a Canon XF100, which has a single 1/3 inch chip. I had pretty good results with the autofocus on that, but on the other hand its small chip tended to mask focusing errors anyway.

So for me, the AF on the X70 falls into the same category as the Image Stabilization - good but not great, no deal breaker, but not one of the very best aspects of the camera.

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Old March 28th, 2015, 02:48 PM   #5
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Re: slow autofocus?

Yes, I find it hunts a lot, very unreliable.
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