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MPB
09-02-2009, 10:15 PM
Many of you are already familiar with the stuttering zoom issue present with some ex cameras. There have been posts on other boards describing it, with various responses from Sony.

This has become an on-going issue with the ex3 that my business partner and I initially purchased in early July. I think we’re on camera number 4 now, having opened up at least two other boxes with new cameras. In short, slow- to mid-speed zooms cannot generally be executed without a pulsing or stuttering action of the lens under constant rocker pressure. In attempting to work around the problem I’ve found that ramping past the slow-zoom range in the rocker position (ignoring the initial stutters), trying to settle on a steady mid-speed zoom will also fail. It’ll work for a moment, but then the zoom speed accelerates (without further rocker pressure) and starts to get away from you. Reducing rocker pressure at this point brings you back into pulsing and stuttering territory. I cannot properly express just how frustrating and embarrassing it is to lose shot after shot like this. Sony is aware of the problem, as they have offered explanations to us either on the phone or in person. But when it comes to their official responses in regard to a specific camera they will not acknowledge that the camera malfunctions.

We took the first camera back to the dealer and put it on their tech’s bench to demonstrate the problem. The dealer immediately suggested that this was a problem that occurred only at 24p, as he had already been given an explanation by Sony before we ever brought it to his attention. This was not the case, as we were able to reproduce the problem then and there at 1080/24p, 1080/30p and 1080/60i. Our dealer sent the camera to Teaneck for repair and Sony sent the camera back indicating they had given the camera and lens a thorough going-over, but acknowledged no malfunction. Obviously a camera that can’t zoom properly is not only a liability, but is pretty much useless for most kinds of work. When a director or producer asks you for a slow zoom, telling him/her that your equipment isn’t capable of it isn’t acceptable. The dealer understood, and we opened up two more boxes to find each new camera exhibited the same problem. We gave them back the camera.

We went to Abel Cine Tech in hopes of finding a functioning camera, and with the hope that if we had to send the camera to Sony again that Abel might have sufficient influence to illicit better attention. In the meantime we had bookings for the camera, so we had plenty of opportunity for real world field tests under different kinds of shooting scenarios. We really wanted to make each camera work, perhaps more than we reasonably should have. If you’ve spent any time working with this camera, maybe you’ll know why.

In fact, on our first visit to Abel there happened to be a Sony rep there. We demonstrated the problem present with the new cameras, then demonstrated its absence in Abel’s floor model. His response was honest, but I was amazed to hear him say, in effect, what do you expect? Their Cine Alta division is manufacturing a $9000 camera, you can’t be surprised if the manufacturing tolerances are a bit off. Maybe they’ll do a better job with the next model iteration.

After working with the new camera for a time we took it back to Abel and told them the results. They asked that we try the repair route again before another exchange, and we agreed to try it. We spoke with the tech who worked on the camera at Teaneck and he indicated that he would replace the front element in the lens. We also spoke with another Sony rep during that time and he brought up the explanation involving the 24p malfunction. Apparently this has something to do with an excess of data overwhelming the processor while zooming in 24p. Obviously he hadn’t actually tested this theory himself. And why would this lead a tech to replace a lens element? We got the camera back with Sony’s assertion that function was normal. We tested the zoom with a variety of video format settings, and it still didn’t work properly.

The staff at Abel have been very helpful and sympathetic. I don’t know what conversations might take place between a dealer and a manufacturer, but there doesn’t seem to be anything they can do. Our options seem to be either keep hoping we’ll eventually get a properly functioning camera, or we’ll just have to hand them the camera back and give up on the ex3. It’s disappointing. We really want to move forward with the ex3, but you can’t invest in a camera that makes you look incapable of executing standard camera moves.

I still can’t get over the idea that you can go out and buy a $300 video camera and it will zoom properly, but that Sony might hope to suggest that this malfunction doesn’t take the ex cameras outside the realm of fitness for purpose.

basspig
09-02-2009, 11:32 PM
WRT the $300, that same comparison has been cited with respect to the "infrared contamination" problem as well.

I just bought an EX3. It zooms smoothly, so far. Knock on wood it stays that way. Sorry to hear that you are amidst a bad batch of EX3's. I hope you get it resolved to your satisfaction.

MPB
09-03-2009, 06:44 AM
Hmm. To be honest, the ir thing never really struck me that way. for one thing, it isn't a case where some ex's do it and others don't, as a matter of manufacturing tolerances. There really isn't anything Sony can do about ir without using a completely different design. And it isn't the only camera model, or manufacturer, to exhibit the problem. And, there's a relatively inexpensive fix for ir, when it pops up.

But your ex3 works, it zooms properly and can be considered fit for purpose.

BTW, if you don't have the issue now, there's no reason to suspect that you will.

robfilms
09-03-2009, 11:43 AM
[QUOTE=MPB;1734279
BTW, if you don't have the issue now, there's no reason to suspect that you will.[/QUOTE]

...or that you won't...

not sending out any future bad vibes but a weak spot is a weak spot.

ymmv

be well

rob
smalltalk productions

Iudex
09-03-2009, 01:47 PM
I didn't know about this issue, is there a sample video somewhere?

bayarea_dvxer
09-05-2009, 09:41 PM
A search on dvxuser for 'stuttering zoom' turns up nothing for the ex-3. I agree with Iudex. Please post some sample video. It's hard to believe that with all the problems you had, you wouldn't have an example to show.

MPB
09-07-2009, 01:28 PM
sorry guys, i've been away for the weekend. you are correct, i haven't found posts about in this board either. but i did find references to it on other ex forums. i don't know what the etiquette is here regarding posting links, but they wouldn't be hard to find if you were interested in doing so. certainly Sony is aware of it.

i might be able to dig through some footage to find an example, but i don't know how helpful it would be, as when it happens during actual shooting there's no reason to hold the shot longer. so it just appears to be a bad zoom, followed by an aborted shot. my partner has the camera right now, and we're taking it in to return it (for the next one) tomorrow. if the problem is present in the next camera, i'll post an example.

in response to my post on another board one of the members there indicated he'd been dealing with Teaneck (Sony repair) for the same issue, having sent his in a couple of times, having it fixed only to have it fail again. they fixed it (which they didn't do for us), but included the following form letter:


"PMWEX1/PMWEX3 Zoom Feature

The PMWEX1/PMWEX3 Zoom Speed Assignment can be set obn the Camera Set Menu.

High - Factory Default:70 Maximum Upper Limit: 99
Low - Factory Default:30 Minimum Recommended Lower Limit: 10

Lower-range adjustments below 10 may not operate smoothly due to the individual characteristics of the Lens or Operating Environment.

Both the PMWEX1 and PMWEX3 are equipped with a high quality, high definition Fujinon 14x Zoom Lens specifically designed for these Camcorders. The included lens offers an exceptional cost/performance ratio, with a variety of versatile functions functions to control Zoom, Focus, and Iris, giving the User a high level of operational control for an optimum shooting experience.

Many creative Videographers sometimes prefer additional options for maximum versatility. To address this, utilizing it's newly developed "EX mount" interchangeable lens system, the PMWEX3 allows a variety of 1/2" type HD lenses available from several major manufacturers to be used with the Camcorder via the included ACM-18 lens adaptor."