PROBLEM LEICA SL2-S ==> File Issue? Camera Issue? Scene Issue? Sudden change in luminosity when recording video.

[Adalva]

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Hi there!

So I just started working with filmmaking and color grading and I have noticed this weird issue with some clips of my footage (10 out of 70 in the edit I am currently working on). The edges of the frame change in luminosity all of the sudden. I am attaching a video of my DaVinci project so you can see it. In the video I am just going back and forth between frames.

Have any of you come across something like this? Do you think it is a file, scene or a camera/sensor issue? Just want to find out ASAP, because if it is camera related I want to ship it right away to get it fixed.

Here are other things that maybe could have something to do with it?

• The selected setting for Exposure Metering
• Floating ISO
• iDR
• Video safety area
• Image Stabilization

Thanks in advance!

Edited July 9, 2024 by Adalva

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[Geoff C. Bassett]

It's the image correction feature on the camera failing during video. I had an issue with M lenses when filming with my SL2, fixed manually set them to a focal length but not a lens type. 

If you are using a L mount zoom I would turn off all image features, especially iDR.

Edited July 9, 2024 by Geoff C. Bassett

[Photoworks]

Looks like lens correction, vignetting, is changing.

what lens did you use?

Personally I have not seen it. but I shoot everything in a controlled mode.

NO iDR ever.

Nothing that changes the color of exposure unless intentional.

[Adalva]

46 minutes ago, Geoff C. Bassett said:

It's the image correction feature on the camera failing during video. I had an issue with M lenses when filming with my SL2, fixed manually set them to a focal length but not a lens type. 

If you are using a L mount zoom I would turn off all image features, especially iDR.

I used a 50mm summicron M-mount (Version IV) with the Leica adapter. So how did you fix it again? I don't understand.

42 minutes ago, Photoworks said:

Looks like lens correction, vignetting, is changing.

How can I fix/prevent it?

43 minutes ago, Photoworks said:

NO iDR ever.

What does iDR really do? I have no clue what it is for.
 

[Geoff C. Bassett]

2 hours ago, Adalva said:

I used a 50mm summicron M-mount (Version IV) with the Leica adapter. So how did you fix it again? I don't understand.

How can I fix/prevent it?

What does iDR really do? I have no clue what it is for.
 

1) Use a dummy adapter to completely prevent the issue. Camera won't try and compensate for the deficiencies of the lens. 

2) Don't know of a fix, just that workaround.

3) iDR changes the image based on the perceived dynamic range to maximize the dynamic range of your file. I would turn this off as a first step because it will raise your shadows/lower your highlights mid-shot and I don't think it's a good option for video to have turned on.

 

[Photoworks]

it could be a bit of play with the adapter that the correction goes in an out when turning.

You don't have to by a new adapter, just use preset from R lenses or OFF

[Photoworks]

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In Davinci you can add a vignetting back on with fade when it goes away.

[Adalva]

11 hours ago, Photoworks said:

it could be a bit of play with the adapter that the correction goes in an out when turning.

You don't have to by a new adapter, just use preset from R lenses or OFF

Ok, but my lenses are M-Mount, not R, does that make a difference?

Also, looking into my files, the issue always happened with m-mount lenses, but it doesn't happen every time I use them, just a few times. Should I be worried? If the problem was the profile in the camera for lens correction, shouldn't it always give the same problem?

13 hours ago, Geoff C. Bassett said:

Use a dummy adapter to completely prevent the issue. Camera won't try and compensate for the deficiencies of the lens. 

A dummy adapter? Not the official one that I have?

[jaapv]

16 hours ago, Geoff C. Bassett said:

1) Use a dummy adapter to completely prevent the issue. Camera won't try and compensate for the deficiencies of the lens. 

2) Don't know of a fix, just that workaround.

3) iDR changes the image based on the perceived dynamic range to maximize the dynamic range of your file. I would turn this off as a first step because it will raise your shadows/lower your highlights mid-shot and I don't think it's a good option for video to have turned on.

 

I don’t think IDR is a good idea for stills either. 

[Geoff C. Bassett]

10 hours ago, Adalva said:

Ok, but my lenses are M-Mount, not R, does that make a difference?

Also, looking into my files, the issue always happened with m-mount lenses, but it doesn't happen every time I use them, just a few times. Should I be worried? If the problem was the profile in the camera for lens correction, shouldn't it always give the same problem?

A dummy adapter? Not the official one that I have?

Either in camera or with a different adapter you want to prevent the camera from trying to corrective lens profiles. 

The same thing happened to me, it was occasionally but meant I could not trust it. I just use a adapter without electronic contacts now.