X70 autofocus issues
 

Used 2 brand new X70's at a wedding over the weekend & have noticed that the focus drops out & hunts every time a camera flash goes off. I've had this with some other camcorders on rare occasions, but on the X70 this seemed to happen EVERY time there was a flash.

I know the larger sensor of the X70 means that focus is slightly more tricky then a standard handicam, but it simply never happens with my VG30 (APS-C) so that theory goes out of the window!

Does anyone think this'll be improved in the June v2 update or do you think I'll be stuck having to use manual focus??

Re: X70 autofocus issues
 

Paul, I had some problems with X70 auto focus as well.
Was filming Christening over the weekend and suddenly focus went blur for couple of seconds. There was no flash. It was in the Church, but not to dark. And then later at reception couple of times had some issues again, but again there was no flash. They didn't had a photographer. I'm worried now what's gonna happen at a wedding...

Hope they can improve this with the latest update.

P.S. overall I like the camera. )

Re: X70 autofocus issues
 

My guess would be that the flash illuminates an object that is not already fully lit, or a background light source, and that that flash creates a new contrast object that the camera wants to hunt for.

Paul

Re: X70 autofocus issues
 

I hear so many great things about this camera, and then every once in awhile, a total bomb shell. We only get one take at it in what we shoot on the circuit, so it has to be right. I still wonder if this camera has not been a little over-hyped.

Re: X70 autofocus issues
 

I haven't had a lot of time to experiment with mine, but typically with my canon XHA1's and GL series (wayback) I'd put a little piece of velcro on the auto/manual focus button to make it easy to find. That way I'd compose the scene and lock focus with one touch and I wouldn't have to worry about anything affecting the focus. Hopefully that'll work on this camera. I do notice the focus seems a bit slower than my canons.
Andy

Re: X70 autofocus issues
 

I have accidentally toggled the A/F button to ZOOM several times. One time was jumping out of my car on a police pursuit. The cars were speeding at me out of focus, and as I tried to turn the dial, it kept zooming in and zooming out. lost the shot, the video looked ridiculous. Why the hell would anyone want to crank a zoom dial by hand, it's not like it's mechanical or can be rotated wide to tele in one turn.

Paul

Re: X70 autofocus issues
 

weve always done all manual on all our cameras and it works quite well on the x70.
y dont you manual focus, its the safest and avoids any hunting period.

Re: X70 autofocus issues
 

well I am NEVER happy with anything (more so lately with Sony!) but I had zero problems with the AF of the X70 , even in extremely low light once I set the face recognition that works very well. There is the option of locking on 1 particular face as well which is also something never seen before with any modern camera (only the JVC850 does that). But the X70 can lock faces with the joystick and that's priceless.
I had many flashes in the frame and the camera never lost it. Honest. worth to try the face recognition thing.

Re: X70 autofocus issues
 

Little update on this:

I was filming a wedding last Saturday and didn't find any problems with auto focus while photographer was using flash, but still had couple of times when focus went blurry at some natural conditions. Not a problem, but annoying...

Re: X70 autofocus issues
 

Autofocus can always be fooled and if you want to be sure you need to be in manual, you can't really blame the camera for not getting it right.

Re: X70 autofocus issues
 

I only use the autofocus on SOT's with the face square feature. I let it put a box on the face, give it a second to sharpen, then turn off the AF so it doesn't hunt off the subject again.

Paul

Re: X70 autofocus issues
 

I think I'll just have to use manual focus in these situations from now on - not the end of the world!

Re: X70 autofocus issues
 

I do it the same a Paul. Once the focus is set I switch to manual. If they move I put it back on auto till they stop. On the Sony EA50 you hit a button and it focuses and then release, but the X70 is still easy.

Re: X70 autofocus issues
 

Paul, forgive my ignorance, is SOT Sound on Tape? Is that when you're interviewing a subject right into the camera with an attached mic, or recording yourself narrate while you shoot, or...? How does that differ for you from other scenarios vis a vis using the autofocus?

I love the autofocus when I tape public meetings because sometimes I speak, and it also helps when people move around while they talk. The face detection + peaking + external LCD monitor if I can use it really help because I'm legally blind.

But tonight I noticed the multi face box problem, where it switched from my much larger main subject's face to a much smaller background face (why?) which threw off focus. So when multiple people were in frame I tried to keep my finger on the joystick to switch back to the correct active face.

P.S. I did get some nice medium depth of field. Love the larger sensor!

Re: X70 autofocus issues
 

Sorry, been working for a TV station for a few years now.

SOT (Sound On Tape) means interview, actual sound n tape means audio to normal humans.

NAT (Natural Sound) can be anything from car engines, honking horns, or people talking to things other than the camera or interviewer. To normal people, NAT sound would indicate background stuff.

VO (Voice Over) means B-roll. To normal people, voice over means to talk over audio. :)

Thanks for alerting me that I can switch boxes with the joystick!

Paul

Re: X70 autofocus issues
 

For me, this is a huge problem with both of my AX100s. I run unattended cameras. The autofocus is by far the worst I've seen in any camera that I've owned since 2004.

For receptions, during dancing, the camera loses focus and EVERYTHING becomes blurred, and this is AFTER the update (which was supposed to improve autofocus).

Yes, there are workarounds, going manual, etc. but then it becomes a case of me having to cater to my camera, which is ridiculous and inexcusable. My VX2000 and every camera I've owned since then never had these kind of issues and it's just nonsense.
So I'm using manual when I must, but I would NOT purchase the camera again if I could avoid it.

I like the camera otherwise, but autofocus is a primary feature that should work reliably. I'm not going to pretend I'm ok with it because I know how to switch to Manual focus. Can I work with it? Yes. Does that make it ok? No it does not.

If you are considering purchasing the X70 or AX100, and if you expect the camera to have reliable Autofocus, be forewarned.

Re: X70 autofocus issues
 

Really good info to know; thanks Jeff. I too would end up using an X70 in different situations where auto focus would be needed (e.g. unattended).

As much as I really like what Sony has done with the cam at such a low price point, I'll gladly deal with lower quality codecs (e.g. 8-bit 4:2:2) if that gives me more usable shots.

Ultimately I'm waiting though until after NAB 2015 to make my decision. If Canon comes up next gen versions of say their XF100, I may go that route. That will also allow further research into this X70 issue.

Re: X70 autofocus issues
 

Is it just me or is the AF on the x70 really slow? This is my first Sony, my Canons were all pretty fast.

Re: X70 autofocus issues
 

This is a very informative thread. I found an AX100 for $1,000 at a local shop and have been considering it.

I'd be using these unmanned (most of the time) at wedding ceremonies for B&G shots.

My thought was to use a couple of iPods to wireless monitor the video feed and make sure focus was on?

Re: X70 autofocus issues
 

For the record, I do like the camera for the most part, but I'm not a fanboy type that will overlook its shortcomings in order to justify my purchase.

It is right that autofocus should be expected to operate properly on any modern camcorder, and there is simply no justification for this issue as far as I can see.

If you can buy this camcorder for $1000 Kyle it would be very tempting. I could live with the issue for $1K, but I paid much more so I'm none too thrilled with it.

Re: X70 autofocus issues
 

Up until recently I had an EX1 and it too had a slow autofocus.

It was explained to me that this may be an intentional design. An example use is when tracking an object in which other object may pass momentarily in front of it. You don't want the autofocus to constantly search for the nearest object in situations like this. In other words, once focus locks on the object you want, you'd want to be able to track the object if momentarily interrupted by a nearer object. It's possible this is a Sony design philosophy since Sony has had more expensive cameras that also exhibit slow autofocus.

I do know if you search the inter webs Sony and Slow Autofocus complaints are found across a number of their cameras.

Re: X70 autofocus issues
 

+1. Here here! Manual all the way with the X70. Using the touch screen 'spot focus' is pretty quick and avoids many of the dramas auto focus can throw your way. The only way I would consider using auto focus on these little cams is if I was full wide and pretty close. But there again with ENG cameras it was always manual focus so I guess its what you are used to. As the lens on the X70 is parfocal you can zoom in focus and reframe back to the shot you need knowing that all will stay in focus. Once you get used to using the X70 in this way I don't think you would go back to AF.

Chris Young
CYV Productions
Sydney

Re: X70 autofocus issues
 

Hi, I attended a wedding yesterday as a guest with an AX100 and took 55 clips. In those 55 only 1 clip did autofocus not really go for the person I wanted, it went for someone in the fore ground. Overall I was really pleased with all the shots I obtained (basically all auto). My son who had a Canon 70D had much more issues and he was only taking stills, many of which were soft and not anywhere near as sharp as the AX100, even snapshots taken from the video were better. The issues with autofocus are 1) the camera does not know what you want in focus and when it does focus you really want it to lock and not hunt and continually check that it is in focus, this is by far the most annoying issue (the AX100 does not do this). I had a Sony XV1000 which continually kept changing the focus by small amounts drove my mad and the only way to deal with it was to use the manual setting and push button auto for initial set. I think the AX100 has much improved auto focus compared to any previous camera I have owned. You can always use touch screen focus to set the focus where you need it. If leaving unattended then set to wide angle focus and switch to manual. Having people go in and out of focus as they move through the field of view would be more acceptable than the camera popping in and out trying to track fast moving dancers. No auto focus will be perfect and Sony have provided useful tools to try and help with the issues, tools include a manual focus button, focus magnification, touch screen focus and focus peaking. The AX100 is a great non-pro camera which has a fantastic lens, sensor, build quality, feature list and 99.5% of the clips posted on you-tube from this camera are stunning (and actually in focus). The AX33 is in a division below for picture quality. The only addition I would like would be the ability to increase colour saturation in the same way you can with AE shift. Andy

Re: X70 autofocus issues
 

This is solid advice and something that would work for my unattended camera situations. Thanks!

Re: X70 autofocus issues
 

I do believe that in general the X70's autofocus is very good - the wedding that I had issues at, was filmed entirely by 'assistants' and the cameras were pretty much on full auto all day. The overwhelming majority of shots where the lighting was good were in focus and the X70 performed as well if not better than many other cameras I've used. (To the ex XHA1 users that have noticed slow AF, doesn't the XHA1 have a phase-detect AF sensor hidden in the hood to the left of the lens? No camera without one will ever get a focus lock as quickly - it's like comparing a DSLR AF to a Point & shoot AF)

However the problem I had, which this thread was initially started about is that in low light, even with a video light on top of the camera, a photographers flash caused the X70 to completely loose focus lock & hunt for a couple of seconds. When reviewing the footage again this was worst case scenario with high gain and a busy background although the B&G were well lit.

I will say that my overall opinion of this camera is very favourable & I'm putting this issue down to a camera quirk (that all cameras have) that I'll just need to keep an eye on.

Re: X70 autofocus issues
 

Since I cannot see the LCD on my new X180 clearly due to distance and my vision with contacts (have to use the EVF), I use AUTOFOCUS A LOT NOW! I must say, the AF in the X180 is completely usable, it WILL focus on something in your shot. You may perhaps have to go manual to "select" which object you want sharp, but it doesn't just go into "ultra-blur" mode like the X70. The X70 AF is useless to me at night.

Paul