Lens Image Stablization - Live Concert Filming

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Matthew_Lawrence

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Lens Image Stablization - Live Concert Filming

PostThu Mar 23, 2023 11:50 pm

Hi,

I sometimes film live concerts, such as dance recitals and one of my cameras is a Pocket 6k Pro paired with a telephoto lens (usually the 100-400mm or the 55-250 EFS lens) on a tripod. This is used to grab a variety of close-ups that will be cut in with the footage from the other cameras. Would you recommend leaving the image stabilization on the lens on or off?

Any advice greatly appreciated.

Thanks,
Matthew
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Uli Plank

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Re: Lens Image Stablization - Live Concert Filming

PostFri Mar 24, 2023 12:59 am

Since your camera supports gyro stabilization with DR, you might do better by keeping it off.
The IS on long lenses is rather optimized for photography and can tend to ‘stick’ when panning.
DaVinci Resolve is very capable even for free, but you need the right hardware!

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Matthew_Lawrence

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Re: Lens Image Stablization - Live Concert Filming

PostFri Mar 24, 2023 7:48 am

Uli Plank wrote:Since your camera supports gyro stabilization with DR, you might do better by keeping it off.
The IS on long lenses is rather optimized for photography and can tend to ‘stick’ when panning.

Great, thanks for the tip.
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Robert Niessner

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Re: Lens Image Stablization - Live Concert Filming

PostFri Mar 24, 2023 10:32 am

The Canon 100-400 does have 2 different OIS modes, one is for panning, the other mode is kind of "sticky". I used that lens with the UM46k for a Fußball doc to film a game and it worked very well.

Make sure to have rods and a lens support system to make your setup as rigid as possible, otherwise you get vibrations introduced. A heavy tripod with a smooth head will also help.

You might want to set your shutter to 90° to get less motion blur for later in post stabilization - if the light situation is ok with this.

FYI so this does not surprise you when it happens:
When the lens OIS is switched on and you got the framing locked - you will find that through the OIS the framing is starting to wander around a bit. That's just the way it works.
Saying "Thx for help!" is not a crime.
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Matthew_Lawrence

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Re: Lens Image Stablization - Live Concert Filming

PostSun Mar 26, 2023 10:18 am

Robert Niessner wrote:The Canon 100-400 does have 2 different OIS modes, one is for panning, the other mode is kind of "sticky". I used that lens with the UM46k for a Fußball doc to film a game and it worked very well.

Make sure to have rods and a lens support system to make your setup as rigid as possible, otherwise you get vibrations introduced. A heavy tripod with a smooth head will also help.

You might want to set your shutter to 90° to get less motion blur for later in post stabilization - if the light situation is ok with this.

FYI so this does not surprise you when it happens:
When the lens OIS is switched on and you got the framing locked - you will find that through the OIS the framing is starting to wander around a bit. That's just the way it works.


Great, thanks for the tips Robert.
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Art Roberts

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Re: Lens Image Stablization - Live Concert Filming

PostTue Mar 28, 2023 10:03 pm

FYI. As a general rule, it is best to turn image stabilization off, if the camera is on sticks. Worked for me.
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Matthew_Lawrence

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Re: Lens Image Stablization - Live Concert Filming

PostWed Mar 29, 2023 6:32 pm

Art Roberts wrote:FYI. As a general rule, it is best to turn image stabilization off, if the camera is on sticks. Worked for me.

Ok, thanks
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Uli Plank

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Re: Lens Image Stablization - Live Concert Filming

PostThu Mar 30, 2023 12:04 am

Depends on the quality of those sticks, in particular with a long lens.
DaVinci Resolve is very capable even for free, but you need the right hardware!

Studio 18.1.4, MacOS 12.6.6, 'sandboxed' 18.5b3 under 13.4
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Robert Niessner

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Re: Lens Image Stablization - Live Concert Filming

PostThu Mar 30, 2023 8:35 am

Here is an example shot I made with the Canon 100-400mm with active OIS on my UM46k and a Sachtler tripod from said Fußball game:
https://laufbildkommission.filemail.com ... dtxqpvkpjy

As you can see it works very well with the active OIS.
Saying "Thx for help!" is not a crime.
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Robert Niessner
LAUFBILDkommission
Graz / Austria
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Blackmagic Camera Blog (German):
http://laufbildkommission.wordpress.com

Read the blog in English via Google Translate:
http://tinyurl.com/pjf6a3m
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Matthew_Lawrence

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Re: Lens Image Stablization - Live Concert Filming

PostWed Apr 19, 2023 6:40 pm

Robert Niessner wrote:Here is an example shot I made with the Canon 100-400mm with active OIS on my UM46k and a Sachtler tripod from said Fußball game:
https://laufbildkommission.filemail.com ... dtxqpvkpjy

As you can see it works very well with the active OIS.
That looks great, thanks Robert.
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Matthew_Lawrence

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Re: Lens Image Stablization - Live Concert Filming

PostWed Apr 19, 2023 6:50 pm

Thanks to everyone who has replied so far on this thread. I just thought I’d post a quick update.

I’ve found it works best to leave the image stabilisation on. This is because I’m never really locked off as I’m following the action around stage so the IS helps to minimise any shake from my hands. With the 100-400 I use the option that allows panning.

Generally when it’s at a proper theatre and the lighting is good, it works well and the shots from the longer lenses cut in nicely with the rest of it, like in the clips below:


However, I recently ran into an issue when shooting a concert in a sports gym. Firstly, the lighting was very dark which isn’t great with those long lenses that aren’t very fast. Also, because I was on the same floor as the drum, the vibration gave me some nasty shake artefacts. It’s only noticeable when using the longer lenses and only where the drum kicks in. It was noticeable to me even on the camera LCD screen so I tried turning image stabilisation off but this didn’t make any difference.

As you can see from the clip below it’s quite noticeable when viewed on a big screen or when you're close to the screen. Anything I can do to rescue it in Resolve? Image Stabilisation isn't helping.
https://vimeo.com/819223459/1854b72cdc

Also, what’s the best way to stop this from happening going forward? I’m assuming a more heavy duty tripod, any suggestions? Currently, I use the E-Image GH06F Fluid Head and E-Image 761 AT Legs and I like this because the head is quite smooth and it’s good in tight spaces. Often I’m not given much room to work with and have to go over seats etc... (see screenshot attached). Sometimes I even have to overlap the legs on the two tripods.

Any suggestions for tripods or lens support systems greatly appreciated.

Thanks,

Matthew
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rick.lang

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Re: Lens Image Stablization - Live Concert Filming

PostWed Apr 19, 2023 8:41 pm

If you have deep pockets and have access via a rental, try something like the OConnor 1040 or even the top of the line 2945 head with a heavy tripod.

But I would first try laying down a few layers of the best yoga mats on the floor that is vibrating. That might be a practical approach that absorbs the vibrations.
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Matthew_Lawrence

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Re: Lens Image Stablization - Live Concert Filming

PostWed Apr 19, 2023 10:50 pm

rick.lang wrote:If you have deep pockets and have access via a rental, try something like the OConnor 1040 or even the top of the line 2945 head with a heavy tripod.

But I would first try laying down a few layers of the best yoga mats on the floor that is vibrating. That might be a practical approach that absorbs the vibrations.
Thanks Rick. I'd not thought of laying something on the floor, I'll give that a try. Unfortunately my pockets aren't deep enough for an OConnor.
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rick.lang

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Re: Lens Image Stablization - Live Concert Filming

PostWed Apr 19, 2023 10:53 pm

Misery loves company so you know you’re well loved!
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Robert Niessner

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Re: Lens Image Stablization - Live Concert Filming

PostThu Apr 20, 2023 8:04 am

Matthew_Lawrence wrote:As you can see from the clip below it’s quite noticeable when viewed on a big screen or when you're close to the screen. Anything I can do to rescue it in Resolve? Image Stabilisation isn't helping.
https://vimeo.com/819223459/1854b72cdc


While this is certainly annoying for you as the cinematographer I can assure you that your audience won't notice or when noticing will still accept it as part of the performance. Because of the vibrations the image will move a bit very fast, resulting in motion blur. When you do post stabilization it will lock the camera movement but amplify the visibility of the motion blur effect much more. That's the trade off.

Matthew_Lawrence wrote:Also, what’s the best way to stop this from happening going forward? I’m assuming a more heavy duty tripod, any suggestions? Currently, I use the E-Image GH06F Fluid Head and E-Image 761 AT Legs and I like this because the head is quite smooth and it’s good in tight spaces. Often I’m not given much room to work with and have to go over seats etc... (see screenshot attached). Sometimes I even have to overlap the legs on the two tripods.


Adding mass will improve resistance to vibrations. Also uncoupling your tripod from the vibrating ground.
I wouldn't use a yoga mat as those tend to make things wobbly.
There are anti-vibration mats for loudspeakers for example. You will need to weight your system and then buy a mat for that weight range.

From your picture I also saw a flaw in your rig. Because of the battery grip your camera sits a few centimeters higher, leading to amplification of vibrations hitting your system. And there seems to be now extra lens support keeping your long lens from "swinging".

Rig up your camera with a cage, keep the optical center as low as possible to the tripod. Use rods and a lens support screwed into the lens foot. Make everything as rigid as possible.

For a tripod - I always would go for a 100mm bowl over a 75mm bowl - because of better rigidity.
Saying "Thx for help!" is not a crime.
--------------------------------
Robert Niessner
LAUFBILDkommission
Graz / Austria
--------------------------------
Blackmagic Camera Blog (German):
http://laufbildkommission.wordpress.com

Read the blog in English via Google Translate:
http://tinyurl.com/pjf6a3m
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Matthew_Lawrence

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Re: Lens Image Stablization - Live Concert Filming

PostThu Apr 20, 2023 11:24 am

Great, thanks Robert. I'll look into a cage. I think I didn't consider it before as it makes the camera a bit heavier for gimbal work.

I take your point about the centre of gravity. On the photo I think I was using the 18-135 STM which isn't too bad. With the 100-400 I tend to mount the lens to the tripod like people do with a DSLR.

Thanks
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