|
12-35mm Lumix ASPH for video -- strange jitter / OIS issue when mounted on a tripod
4 months ago
|
Anyone else experience this issue?
I encountered a problem with my Panasonic 12-35mm/F2.8 ASPH X lens. I'm using this primarily for video.
When mounted on a GH2 or GH3 and placed on a tripod, even with Power Image Stabilization OFF, the image frequently shimmers. There's a lateral movement in the image. This happens more frequently when the camera is angled downward. The camera is mounted on a Sachtler FSB8 head and Gitzo legs. It's sturdy and totally locked down, and there is no movement near the camera to cause camera shake.
It's as if the image stabilization is on or the lens motors are moving, when obviously they shouldn't be. When the IS switch on the lens is set in the "off" position, the camera correctly reports that image stabilization is off.
Here's a sample:
|
Re: 12-35mm Lumix ASPH for video -- strange jitter / OIS issue when mounted on a tripod
In reply to John W Moon,
4 months ago
|
John W Moon wrote:
Anyone else experience this issue?
I encountered a problem with my Panasonic 12-35mm/F2.8 ASPH X lens. I'm using this primarily for video.
When mounted on a GH2 or GH3 and placed on a tripod, even with Power Image Stabilization OFF, the image frequently shimmers. There's a lateral movement in the image. This happens more frequently when the camera is angled downward. The camera is mounted on a Sachtler FSB8 head and Gitzo legs. It's sturdy and totally locked down, and there is no movement near the camera to cause camera shake.
It's as if the image stabilization is on or the lens motors are moving, when obviously they shouldn't be. When the IS switch on the lens is set in the "off" position, the camera correctly reports that image stabilization is off.
Here's a sample:
A few things, First shoot video in manual exposure all the time is preferred.
Use the 180 degree shutter rule when shooting video. This says the shutter speed is double the frames per second. So for 30 FPS shutter is 1/60, for 24 FPS shutter is 1/48 (actually 1/50 for this camera) and 60 fps would be 1/120 etc. You can go maybe one shutter speed faster at most.
You can use camera in two ways. If you use the main dial set to what ever you can lock shutter speed in the video set up under FLCKR control. If you use the M with video Icon you can go into the same menu and set P,S,A,M
This is where I advise using a constant aperture lens. If you zoom with a variable aperture lens you are changing exposure and you will get a flicker like a light switch going on and off to a lesser degree. You are good with the 12-35 2.8. You used the 14-140 and at :16 seconds you zoomed the lens or did something, its obvious exposure changed.
Use a fluid video head for pans and tilts
Be aware the light source because light "waves" can flicker so try not to include lights in the video that are illuminating the room.
IMPORTANT: Image stabilization is non-existent with the GH-3 for video. It only works for stills it does not matter if IS is on or off.
I just purchased and am testing the RPS studio flo pod. B&H has the lowest price.
|
Re: 12-35mm Lumix ASPH for video -- strange jitter / OIS issue when mounted on a tripod
In reply to John W Moon,
4 months ago
|
That's bizarre. It certainly looks like IS is on and struggling with the tripod mount. Maybe you could put your ear to the lens and listen to see if you can hear the motors moving.
|
Re: 12-35mm Lumix ASPH for video -- strange jitter / OIS issue when mounted on a tripod
In reply to ryan2007,
4 months ago
|
?? Did you read the original post?
|
Re: 12-35mm Lumix ASPH for video -- strange jitter / OIS issue when mounted on a tripod
In reply to amtberg,
4 months ago
|
amtberg wrote:
That's bizarre. It certainly looks like IS is on and struggling with the tripod mount. Maybe you could put your ear to the lens and listen to see if you can hear the motors moving.
@amtberg I don't hear anything, but on the other hand this is a silent lens.
IS is certainly turned off. (And the LCD screen on the GH3 indeed reports that image stabilization is turned off.)
Anyone else own this lens and is able to perform this test?
|
Re: 12-35mm Lumix ASPH for video -- strange jitter / OIS issue when mounted on a tripod
In reply to John W Moon,
4 months ago
|
are you just set up on a tripod and Not doing any pans or tilts while actively recording and its just jittery?
|
Re: 12-35mm Lumix ASPH for video -- strange jitter / OIS issue when mounted on a tripod
In reply to John W Moon,
4 months ago
|
John W Moon wrote:
amtberg wrote:
That's bizarre. It certainly looks like IS is on and struggling with the tripod mount. Maybe you could put your ear to the lens and listen to see if you can hear the motors moving.
@amtberg I don't hear anything, but on the other hand this is a silent lens.
IS is certainly turned off. (And the LCD screen on the GH3 indeed reports that image stabilization is turned off.)
Anyone else own this lens and is able to perform this test?
I just tested mine on a GH3 and it's rock solid.
The IS unit is very very quiet, but if you hold your ear right up to the lens you can hear it (set to MF so it isn't masked by the focus motor).
Only think I can think is that the IS switch isn't really working, even if it's reporting to the camera that IS is off.
|
Re: 12-35mm Lumix ASPH for video -- strange jitter / OIS issue when mounted on a tripod
In reply to ryan2007,
4 months ago
|
ryan2007 wrote:
are you just set up on a tripod and Not doing any pans or tilts while actively recording and its just jittery?
Ryan, ol' bean, what 'ave you been a smokin'? It appears your didn't read the OP, read the description of his setup in his link, or view the video! And simply pasted in a half page of boilerplate with no relevance to his problem! The motion is a regular 3-4 Hertz lateral oscillation only with the 12-35, very strange. Another person described the same symptoms with the 12-35/GH3 in comments under the video, and I've been seriously considering getting one. Hmmm...
And another thing, where the heck did you get the "no OIS with GH in video mode" wild idea? Of course it works, unless my 100-300 and P-L 14-150 are the only lenses it works with. At 150mm + EC and 100-300 at 300mm I can see and record every heartbeat hand holding it with OIS turned off. Smooths all the finer movements like butter when turned on in mid-filming, and they return to baseline with it off. If your doesn't work in video, perhaps you've turned it off in menu.
Pete
|
Re: 12-35mm Lumix ASPH for video -- strange jitter / OIS issue when mounted on a tripod
In reply to John W Moon,
4 months ago
|
John W Moon wrote:
Anyone else experience this issue?
I encountered a problem with my Panasonic 12-35mm/F2.8 ASPH X lens. I'm using this primarily for video.
When mounted on a GH2 or GH3 and placed on a tripod, even with Power Image Stabilization OFF, the image frequently shimmers. There's a lateral movement in the image. This happens more frequently when the camera is angled downward. The camera is mounted on a Sachtler FSB8 head and Gitzo legs. It's sturdy and totally locked down, and there is no movement near the camera to cause camera shake.
It's as if the image stabilization is on or the lens motors are moving, when obviously they shouldn't be. When the IS switch on the lens is set in the "off" position, the camera correctly reports that image stabilization is off.
Here's a sample:
If you can rule out everything else, I would suspect a flaw in the mechanism that holds the OIS lens group in place. Note that even with OIS off, power is required to hold the OIS lens group in proper position. Without power, it just falls where gravity takes it.
If you can repeat the experiment with another lens of roughly the same FL and everything works OK in that case, I'd say you probably need to have your 12-35 serviced or replaced.
|
Re: 12-35mm Lumix ASPH for video -- strange jitter / OIS issue when mounted on a tripod
In reply to John W Moon,
4 months ago
|
John,
I'm afraid I can't add any suggestions to what has been offered. It appears you have covered the obvious. Please do post your findings as this is a camera/lens combo that is of interest to many (certainly to me) and what you're seeing would be a show stopper for video use.
--
RalphM
|
Re: 12-35mm Lumix ASPH for video -- strange jitter / OIS issue when mounted on a tripod
In reply to Anders W,
4 months ago
|
Anders W wrote:
John W Moon wrote:
Anyone else experience this issue?
I encountered a problem with my Panasonic 12-35mm/F2.8 ASPH X lens. I'm using this primarily for video.
When mounted on a GH2 or GH3 and placed on a tripod, even with Power Image Stabilization OFF, the image frequently shimmers. There's a lateral movement in the image. This happens more frequently when the camera is angled downward. The camera is mounted on a Sachtler FSB8 head and Gitzo legs. It's sturdy and totally locked down, and there is no movement near the camera to cause camera shake.
It's as if the image stabilization is on or the lens motors are moving, when obviously they shouldn't be. When the IS switch on the lens is set in the "off" position, the camera correctly reports that image stabilization is off.
Here's a sample:
If you can rule out everything else, I would suspect a flaw in the mechanism that holds the OIS lens group in place. Note that even with OIS off, power is required to hold the OIS lens group in proper position. Without power, it just falls where gravity takes it.
If you can repeat the experiment with another lens of roughly the same FL and everything works OK in that case, I'd say you probably need to have your 12-35 serviced or replaced.
Another thought on testing: Can you see the same effect on the LCD (perhaps using magnified view to make things more easily visible) even when you are not shooting video, just using live view?
|
Re: 12-35mm Lumix ASPH for video -- strange jitter / OIS issue when mounted on a tripod
In reply to Anders W,
4 months ago
|
Anders W wrote:
John W Moon wrote:
Anyone else experience this issue?
I encountered a problem with my Panasonic 12-35mm/F2.8 ASPH X lens. I'm using this primarily for video.
When mounted on a GH2 or GH3 and placed on a tripod, even with Power Image Stabilization OFF, the image frequently shimmers. There's a lateral movement in the image. This happens more frequently when the camera is angled downward. The camera is mounted on a Sachtler FSB8 head and Gitzo legs. It's sturdy and totally locked down, and there is no movement near the camera to cause camera shake.
It's as if the image stabilization is on or the lens motors are moving, when obviously they shouldn't be. When the IS switch on the lens is set in the "off" position, the camera correctly reports that image stabilization is off.
Here's a sample:
If you can rule out everything else, I would suspect a flaw in the mechanism that holds the OIS lens group in place. Note that even with OIS off, power is required to hold the OIS lens group in proper position. Without power, it just falls where gravity takes it.
If you can repeat the experiment with another lens of roughly the same FL and everything works OK in that case, I'd say you probably need to have your 12-35 serviced or replaced.
He did repeat the experiment in the second half of the video and it was rock solid...strange!
--
Rick Krejci
http://www.ricksastro.com
|
Re: 12-35mm Lumix ASPH for video -- strange jitter / OIS issue when mounted on a tripod
In reply to John W Moon,
4 months ago
|
I'll have to try this. I have the 12-35 and the gh3.
I have noticed that with IS on, my 35-100 does the shimmying thing similar to what you're showing when held pretty still (like the camera sitting om my lap for stability). My other lenses don't do that.
I'll do a more thorough test of both of these lenses tonight to see. I also have the 14-140 for a comparison.
--
Rick Krejci
http://www.ricksastro.com
|
Re: 12-35mm Lumix ASPH for video -- strange jitter / OIS issue when mounted on a tripod
In reply to ryan2007,
4 months ago
|
ryan2007 wrote:
John W Moon wrote:
Anyone else experience this issue?
I encountered a problem with my Panasonic 12-35mm/F2.8 ASPH X lens. I'm using this primarily for video.
When mounted on a GH2 or GH3 and placed on a tripod, even with Power Image Stabilization OFF, the image frequently shimmers. There's a lateral movement in the image. This happens more frequently when the camera is angled downward. The camera is mounted on a Sachtler FSB8 head and Gitzo legs. It's sturdy and totally locked down, and there is no movement near the camera to cause camera shake.
It's as if the image stabilization is on or the lens motors are moving, when obviously they shouldn't be. When the IS switch on the lens is set in the "off" position, the camera correctly reports that image stabilization is off.
Here's a sample:
A few things, First shoot video in manual exposure all the time is preferred.
Use the 180 degree shutter rule when shooting video. This says the shutter speed is double the frames per second. So for 30 FPS shutter is 1/60, for 24 FPS shutter is 1/48 (actually 1/50 for this camera) and 60 fps would be 1/120 etc. You can go maybe one shutter speed faster at most.
You can use camera in two ways. If you use the main dial set to what ever you can lock shutter speed in the video set up under FLCKR control. If you use the M with video Icon you can go into the same menu and set P,S,A,M
This is where I advise using a constant aperture lens. If you zoom with a variable aperture lens you are changing exposure and you will get a flicker like a light switch going on and off to a lesser degree. You are good with the 12-35 2.8. You used the 14-140 and at :16 seconds you zoomed the lens or did something, its obvious exposure changed.
Use a fluid video head for pans and tilts
Be aware the light source because light "waves" can flicker so try not to include lights in the video that are illuminating the room.
IMPORTANT: Image stabilization is non-existent with the GH-3 for video. It only works for stills it does not matter if IS is on or off.
I just purchased and am testing the RPS studio flo pod. B&H has the lowest price.
I know you mean well, but please stop posting the same boilerplate misinformation. The IS DOES work in video just fine and it's as effective as most dedicated camcorders.
--
Rick Krejci
http://www.ricksastro.com
|
Re: 12-35mm Lumix ASPH for video -- strange jitter / OIS issue when mounted on a tripod
In reply to RicksAstro,
4 months ago
|
RicksAstro wrote:
He did repeat the experiment in the second half of the video and it was rock solid...strange!
The second half of the video is with the 14-140.
--
Everybody loves gadgets, until they try to make them
http://www.flickr.com/photos/thinkfat
http://thinkfat.blogspot.com
|
Re: 12-35mm Lumix ASPH for video -- strange jitter / OIS issue when mounted on a tripod
In reply to thinkfat,
4 months ago
|
thinkfat wrote:
RicksAstro wrote:
He did repeat the experiment in the second half of the video and it was rock solid...strange!
The second half of the video is with the 14-140.
Yes, that's why I mentioned it. Anders was wanting him to test with another lens and I was saying that he did already do that.
--
Rick Krejci
http://www.ricksastro.com
|
Re: 12-35mm Lumix ASPH for video -- strange jitter / OIS issue when mounted on a tripod
In reply to RicksAstro,
4 months ago
|
RicksAstro wrote:
Anders W wrote:
John W Moon wrote:
Anyone else experience this issue?
I encountered a problem with my Panasonic 12-35mm/F2.8 ASPH X lens. I'm using this primarily for video.
When mounted on a GH2 or GH3 and placed on a tripod, even with Power Image Stabilization OFF, the image frequently shimmers. There's a lateral movement in the image. This happens more frequently when the camera is angled downward. The camera is mounted on a Sachtler FSB8 head and Gitzo legs. It's sturdy and totally locked down, and there is no movement near the camera to cause camera shake.
It's as if the image stabilization is on or the lens motors are moving, when obviously they shouldn't be. When the IS switch on the lens is set in the "off" position, the camera correctly reports that image stabilization is off.
Here's a sample:
If you can rule out everything else, I would suspect a flaw in the mechanism that holds the OIS lens group in place. Note that even with OIS off, power is required to hold the OIS lens group in proper position. Without power, it just falls where gravity takes it.
If you can repeat the experiment with another lens of roughly the same FL and everything works OK in that case, I'd say you probably need to have your 12-35 serviced or replaced.
He did repeat the experiment in the second half of the video and it was rock solid...strange!
OK. Good. Didn't look that far. So must be the lens. And if it's the lens, the only thing I can think of is the OIS malfunctioning in the way I described. The only other thing I can think of would be AF-C constantly checking for proper focus but it didn't look like that and I would think the OP had disabled AF-C already.
|
Re: 12-35mm Lumix ASPH for video -- strange jitter / OIS issue when mounted on a tripod
In reply to RicksAstro,
4 months ago
|
RicksAstro wrote:
I'll have to try this. I have the 12-35 and the gh3.
I have noticed that with IS on, my 35-100 does the shimmying thing similar to what you're showing when held pretty still (like the camera sitting om my lap for stability). My other lenses don't do that.
I'll do a more thorough test of both of these lenses tonight to see. I also have the 14-140 for a comparison
Just tried to repeat your results with both my 12-35 and 35-100. I just had the GH3 setting on a table top. Both were rock solid with IS on and IS off. So I'm not sure what was happening with yours. Curious!
--
Rick Krejci
http://www.ricksastro.com
|
Re: 12-35mm Lumix ASPH for video -- strange jitter / OIS issue when mounted on a tripod
In reply to John W Moon,
4 months ago
|
I just checked my 12-35 and I must say that I did notice some jitter (a rotation motion) but only when I was viewing the magnified image while adjusting manual focus. I mean if I turn the focus ring and let the magnified image appear, I then let go of the camera and I can see a slight rotating motion.
At normal 100% viewing, I don't notice it.
Here is a short video I took. Camera is locked on a tripod and pointed down about 30 degrees. Lens is zoomed in to 35mm. All settings are in manual mode, 1/60 shutter speed, F2.8 and set 1080P 30FPS.
|
Re: 12-35mm Lumix ASPH for video -- strange jitter / OIS issue when mounted on a tripod
In reply to Pete Berry,
4 months ago
|
Pete Berry wrote:
ryan2007 wrote:
are you just set up on a tripod and Not doing any pans or tilts while actively recording and its just jittery?
Ryan, ol' bean, what 'ave you been a smokin'? It appears your didn't read the OP, read the description of his setup in his link, or view the video! And simply pasted in a half page of boilerplate with no relevance to his problem! The motion is a regular 3-4 Hertz lateral oscillation only with the 12-35, very strange. Another person described the same symptoms with the 12-35/GH3 in comments under the video, and I've been seriously considering getting one. Hmmm...
And another thing, where the heck did you get the "no OIS with GH in video mode" wild idea? Of course it works, unless my 100-300 and P-L 14-150 are the only lenses it works with. At 150mm + EC and 100-300 at 300mm I can see and record every heartbeat hand holding it with OIS turned off. Smooths all the finer movements like butter when turned on in mid-filming, and they return to baseline with it off. If your doesn't work in video, perhaps you've turned it off in menu.
Pete
Yep, I think I screwed this up, sorry forum, and no bogarting...
   |
|
Connect with dpreview
|
