View Full Version : Advice on using GH2 as a locked off wideshot video camera?


John Vasey
March 2nd, 2011, 10:58 AM
I own the Sony NX5U but am thinking of the GH2 as a possible "unmanned locked off" wideshot camera for event video: which could encompass talking head press panels, plays, musicals. I would use Sony other camera for closer coverage, pans, zooms, etc.

For those that already are owners of the GH2, could you pass along any advice regarding that possible usage of the GH2....could I possibly lock off video gain/ISO, shutter, and let the iris float under auto exposure?...(and if there is a viable AE shift control or "Spotlight" control, perhaps they could be activated to help control the fluctuations in lighting to some degree and minimize blown out highlights).

I'm looking at the GH2 or the Sony CX550 camcorder (which is much less precise in its manual controls)...as a lower cost alternative second camera for these wider unmanned shots.

Thanks for any help you can offer...

John

Jeff Harper
March 2nd, 2011, 12:09 PM
It would work perfectly, but you really would need the 20mm panasonic lens, it's not an option for wedding work, it is a requirement. The kit lenses with the GH2 I find are generally too poor in low light to be effective wor wedding work, at leas that was my experience last week. The 14-140 is way too poor in low light to be useful in a less then great lighting situation.

I strongly urge you to consider the GH1 for this purpose also. They are available for $400-$500, shoot essentially the same quality, and you'd save a BUNDLE.

Here's what you need:

GH1 $500 + 20mm lens $350 + 2 batteries $60 + 1 class 10 16GB $30 and you'd be ready to go, nothing else needed. Prices are guesstimates, but close enough. Don't skimp on the card, get a class 10, 16gb is good for over an hour.

$1k and you are in business. If you like it enough then you could get a GH2 for run and gun later, they are hard to find now anyway.

I have footage on my PC right now from a wedding using both the GH2 and GH1, and there is no significant difference in the footage.

If I had to do it over again, I would have bought two GH1s Body ONLY and then bought 1 20mm lens, then another lens for use with the DMW-MA1 adapter for using another lens, though I still haven't decided which one I would use, likely a sigma or Rikono 85mm, at least that is what I'm looking at now.

You need to stick with fast lenses for weddings.

Jim Forrest
March 2nd, 2011, 02:29 PM
I don't think the Sony CX550 is going to give you the control over the image as the GH1 or GH2 will.
Both GH's would be excellent as lock down cameras.
GH2 will give you a little higher resolution but as Jeff says, there are great deals on the GH1 and it should cut just fine with your Sony NX5U. You would just have to match the 2 on color/user profiles.

Jon Braeley
March 3rd, 2011, 06:51 AM
I would not use the GH2 for this. Very limited choices for very fast wide angles.

I would get the lower range Canons - 60D-2Ti ..... far better for wide angle shots - you have a great choice of some of the best lenses available. I use the Tokina 11-16 on a 7D for the shot you are talking about - superb lens and what a bargain.

I am disapointed in the W/A lens choice for GH2 right now unless you go with adapters and wrestle with shooting wide open and stopping the lens down using the adapter. For room shots you need to be wider than 20mm on a GH2 or use this as a max. If you do not mind playing around with adapters and searching for cheaper lenses (ie, less than $2k) then go for the GH2.... or wait until it gets better which it will.

Jeff Harper
March 3rd, 2011, 07:13 AM
Actually, Jon is correct on the lack of wide angle lenses for the GH2, which I have been struggling with. However I found the Tokina for Canon below, which I would expect to work well with the GH2, using the Panasonic adapter. I have read that there is no loss of light using the adapter ring, but I have no idea if that is or could be true.

Anyway, the lens look promising, but is expensive.

Amazon.com: Tokina 11-16MM F/2.8 ATX 116 Lens for Canon EOS AF Digital - Tokina ATX116PRODXC: Camera & Photo

Jim Forrest
March 3rd, 2011, 08:53 AM
Trouble with the Canons is if it is a lock down camera you would want it to go more than 12 or 20 minutes.
With the GH1 or GH2 you can leave it rolling.

Jeff Harper
March 3rd, 2011, 09:04 AM
Jim, good point, pretty useless as an unattended camera. Jim, do you know (I don't) if the 600d (T3i) has done away with that issue of limited time?

David Grinnell
March 3rd, 2011, 09:10 AM
Hey jeff, I know that they have not changed it on the t3i... it still uses the fat32 file system and thats the reason for the file limit

Jim Forrest
March 3rd, 2011, 09:17 AM
How did Panasonic GH2 get around this problem of limited shooting times?

Jeff Harper
March 3rd, 2011, 09:18 AM
David, that's too bad. I had thought for a minute of considering a Canon as my third cam for ease of lens selection and not having to use an adapter.

Brian Luce
March 3rd, 2011, 09:37 AM
Just about any lens every made can fit on a GH2. Is it the crop factor you're talking about?

David Grinnell
March 3rd, 2011, 09:38 AM
How did Panasonic GH2 get around this problem of limited shooting times?

Well they did and didnt, SDCH has to be fat32 its the only way your camera will work with them... And the fat32 still has a file size limit.

So I ran a test using 1080p/24 (highest bit rate) The GH2 started a second file at 33:39:01 (33 minutes, 30 seconds, + one frame) according to Vegas. The second file picked up the same clip with no break and proceeded for another 19 minutes

it appears there is no break in the clip. In your video editor, you just add the second file to your sequence timeline and butt it up to the first file. You can do this with the canon cameras but they will have a few seconds between the clips that didnt get recorded

so it still has the fat32 to work with, but unlike the canon cameras it doesnt stop recording

Brian Luce
March 3rd, 2011, 10:44 AM
So I ran a test using 1080p/24 (highest bit rate) The GH2 started a second file at 33:39:01 (33 minutes, 30 seconds, + one frame) according to Vegas. The second file picked up the same clip with no break and proceeded for another 19 minutes



This is true, I've filmed a lot of long lectures and the fat32 (4gig?) limit is no issue, it starts a new file seamlessly.

However, on PAL models I think there's a 30 minute limit -- having something to do with import duties/EU classifications.

The record limitation on the Canon 7d was truly annoying. As was the overheating, as was the moire, the aliasing, the lousy audio...

Jeff Harper
March 3rd, 2011, 01:24 PM
No, not crop factor, but wide lenses that I can slap on a camera that are made for it. But in retrospect, it probably is unnecessary with adapters to buy a Rebel. It was an impulsive thought, haven't seriously considered it yet.

John Vasey
March 3rd, 2011, 08:48 PM
Thanks everyone for sharing your comments. They are extremely helpful and I'm carefully considering all of your thoughts.

One further question...on the GH2, whether you are recording 24p or 1080i, can you invoke an AE shift command...which would could force the auto exposure level up or down depending on where you set it? This can be helpful if you are doing a high contrast situation on stage where you have locked off the video gain/ISO, locked off the shutter, and are leaving the iris floating (on auto)....and you want to minimize blownout highlights.

Or, alternatively, would there be a SPOTLIGHT function that may have a similar effect?

If you can't use AE shift or Spotlight while recording, that would be helpful to know.

Again, the suggestion here is that this camera is a locked off wideshot cam, no panning, tilting, zooming, etc.

Thanks,

John

Jim Forrest
March 6th, 2011, 08:35 AM
In the Movie Mode 24p Cinema setting you can set your ISO, shutter speed and f-stop ahead a time.
I have not seen any spot mode.
To have a floating iris you would need to be in 'S' to lock the shutter and would be shooting at 1080i.

Jeff Harper
March 6th, 2011, 09:22 AM
I wonder, would it be better to have ISO on auto, and exposure set rather than the reverse? I guess it would depend on the scenario, wouldn't it?

John Vasey
March 8th, 2011, 11:39 PM
Thanks to all for answering my additional questions on the GH2....extremely helpful and much appreciated...John

Eric Lagerlof
March 9th, 2011, 02:52 PM
John, there is no SPOT type feature that I know of on the GH2. I shot a high contrast theater piece in just such a situation, dark on the sides, main talent spotlighted, with both a GH2 and my Sony FX-1 HDV camcorder. The GH2 was somewhat contrasty in parts and I got some blown out highlights and noisy darks. That said, it still looked pretty good.

I would be wary of using auto iso, at anything over 800, iso gets noisy and I did get most of the noise in the darker parts of the frame. I used the kit 14-42mm f3.5 lens, and I've quickly learned that indoor lighting and darker shots really need a faster lens. I've seen other indoor and contrasty footage from the GH2 and it looked great, I clearly don't have a great understanding of the camera yet. It's a different beast then a video camera! (And FWIW, I engineer video multi cam sytems, matching cameras for live switched shows, so I do know my video.)

This post may not help a whole lot. Just letting you know my experience. It will give you great images and it's a very good camera. It can be used for lock-off shots, but was not really designed for that in mind.

Dan Asseff
March 9th, 2011, 08:22 PM
I am in the same situation. I have the NX5 an was wanting the GH2 for a second cam and for bridal prep work. How is the low light for reception work? Is there an adapter for Nikon lenses?


Dan

John Vasey
March 9th, 2011, 09:50 PM
Eric,

Thanks for your input regarding your experience in shooting a theatre show with spotlights. One of the issues I face in running an unmanned wideshot video camera is can the camera compensate for the varying lighting conditions, especially high contrast work and low light. A camcorder like the Sony CX550 and 560 apparently have some real flexibility here based on posts in the NX5U forum...using AE shift and the "spotlight" function. So it sounds as if the GH2 may be limited in this respect for compensating for varying lighting conditions on it's own as an unmanned camera, though for an evenly lit scenario, say, a wideshot of a press conference, I think it would definitely excel there. Thanks again for the info you contributed...it is very helpful on my end...John

Eric Lagerlof
March 10th, 2011, 11:08 PM
John, at this point, I basically agree. Easier and possibly better overall with a dedicated video camera in this particular situation. However, if I were to use a faster lens, like the f1.7 pancake lens, I might be giving you a whole different review. This is one of the big differences. People have made suggestions about using not only low contrast filters but even pointing to lower/higher contrasting lenses.

It's not so much that the GH2 might not do a good job being a lockdown camera, but I'm just not sure how it's done yet.

Jeff Harper
March 11th, 2011, 01:04 AM
John, an ideal camera for you would be the FX1000. I was too quick to endorse the GH2 for your work. You cannot depend on a f/4.0 kit lens, probably, and with a prime you'd have no zoom ability. It would be probelmatic, I would think.

The GH1 I received yesterday is a nice camera, but in low light it doesn't quite compare to the GH2, so I was mistaken to endorse it so fast...unless you can use a fast prime lens, and know what size you need, cool.

I am considering an FX1000 (I've owned two in the past) to give me what I need from the rear, maybe use it in conjunction with a prime lens on the GH1.