Issue with Minimum Auto ISO Not Going Below 800 in C1 Mode on Canon R5

[Daniiltje]

I'm encountering an issue with my Canon R5 when shooting video in C1 mode with Auto ISO enabled. Despite setting the minimum ISO to 100 in the menu (Menu -> ISO speed settings -> Auto ISO range -> Minimum set to L(100)), the ISO doesn't go lower than 800 during video recording.

Has anyone else experienced this, and does anyone know how to fix it so that the minimum ISO is 100 instead of 800? Am I missing a setting or is there a constraint I should be aware of?

Thanks for your help!

 

[Rudy Pohl]

I'm encountering an issue with my Canon R5 when shooting video in C1 mode with Auto ISO enabled. Despite setting the minimum ISO to 100 in the menu (Menu -> ISO speed settings -> Auto ISO range -> Minimum set to L(100)), the ISO doesn't go lower than 800 during video recording.

Has anyone else experienced this, and does anyone know how to fix it so that the minimum ISO is 100 instead of 800? Am I missing a setting or is there a constraint I should be aware of?

Thanks for your help!

Are you shooting in any of the Log profiles? The R5 had two base ISOs, 800 and 3200 and I'm guessing that when shooting in Log it defaults to 800 or 3200. Not sure, just a guess.

Rudy

 

[PicPocket]

I'm encountering an issue with my Canon R5 when shooting video in C1 mode with Auto ISO enabled. Despite setting the minimum ISO to 100 in the menu (Menu -> ISO speed settings -> Auto ISO range -> Minimum set to L(100)), the ISO doesn't go lower than 800 during video recording.

Has anyone else experienced this, and does anyone know how to fix it so that the minimum ISO is 100 instead of 800? Am I missing a setting or is there a constraint I should be aware of?

Thanks for your help!

I think you have CLOG3 enabled. 800 is base ISO for CLOG3. That is how you get those extra stops of highlight headroom. see here for explanation - https://www.dpreview.com/articles/3...g-on-the-canon-eos-r5-shoot-c-log3-here-s-why

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PicPocket

 

[Daniiltje]

Yes, I am shooting in CLOG3. Is there no way to go around it in that case apart from getting an ND filter?

 

[JustUs7]

Yes, I am shooting in CLOG3. Is there no way to go around it in that case apart from getting an ND filter?

An ND filter won’t change the base ISO in CLOG3. Just don’t shoot in CLOG if you want ISO 100.

 

[Daniiltje]

Sorry for the confusion. What I meant is that when shooting in C-Log3, the camera uses a minimum ISO of 800, which is +3EV and often results in overexposed shots. To compensate for this overexposure, I find that using an ND filter helps manage the exposure better.

I really appreciate the flat profile of C-Log3 compared to the default profile, as it provides me with more flexibility for editing the video afterward. Are there any other suggestions or tips for managing exposure while still taking advantage of C-Log3’s benefits?

 

[JustUs7]

Makes perfect sense. My mistake on that.

 

[PicPocket]

Sorry for the confusion. What I meant is that when shooting in C-Log3, the camera uses a minimum ISO of 800, which is +3EV and often results in overexposed shots. To compensate for this overexposure, I find that using an ND filter helps manage the exposure better.

I really appreciate the flat profile of C-Log3 compared to the default profile, as it provides me with more flexibility for editing the video afterward. Are there any other suggestions or tips for managing exposure while still taking advantage of C-Log3’s benefits?

Unless shooting RAW video, when set to [On (clog3)]

• Manually setting the ISO speed to 100–640 will make the dynamic range narrower.
• Canon Log 3 offers a dynamic range of approx. 1600% at ISO 800 or higher.
• The following are expanded ISO speeds: ISO 100, 125, 160, 200, 250, 320, 400, 500 and 640. [L] is displayed when an ISO speed is set.

If you read the article I linked in my first reply and understand how log works, you will see that the editing latitude actually comes from those extra stops of ISO headroom. You can certainly override that and shoot in extended ISO mode, but then you lose that additional DR, it's not better than shooting a flat picture style without clog3. This is why clog is not just another picture style, there is more going on.

If you really want the benefits of clog3, get some ND filters

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PicPocket

 

[Higgins2002]

Sorry for the confusion. What I meant is that when shooting in C-Log3, the camera uses a minimum ISO of 800, which is +3EV and often results in overexposed shots. To compensate for this overexposure, I find that using an ND filter helps manage the exposure better.

I really appreciate the flat profile of C-Log3 compared to the default profile, as it provides me with more flexibility for editing the video afterward. Are there any other suggestions or tips for managing exposure while still taking advantage of C-Log3’s benefits?

Have you tried HDR PQ 10 bit that one goes down to ISO 160

 

[PicPocket]

Sorry for the confusion. What I meant is that when shooting in C-Log3, the camera uses a minimum ISO of 800, which is +3EV and often results in overexposed shots. To compensate for this overexposure, I find that using an ND filter helps manage the exposure better.

I really appreciate the flat profile of C-Log3 compared to the default profile, as it provides me with more flexibility for editing the video afterward. Are there any other suggestions or tips for managing exposure while still taking advantage of C-Log3’s benefits?

Unless shooting RAW video, when set to [On (clog3)]

• Manually setting the ISO speed to 100–640 will make the dynamic range narrower.
• Canon Log 3 offers a dynamic range of approx. 1600% at ISO 800 or higher.
• The following are expanded ISO speeds: ISO 100, 125, 160, 200, 250, 320, 400, 500 and 640. [L] is displayed when an ISO speed is set.

If you read the article I linked in my first reply and understand how log works, you will see that the editing latitude actually comes from those extra stops of ISO headroom. You can certainly override that and shoot in extended ISO mode, but then you lose that additional DR, it's not better than shooting a flat picture style without clog3. This is why clog is not just another picture style, there is more going on.

If you really want the benefits of clog3, get some ND filters

Of course, if you care more for shadows rather than highlights, you can simply expose a stop or 2 higher with clog-3, and that would be no worse than shooting at lower ISO. In fact this is what the extended ISO ranges would do

notice how the linked article compares clog and clog3 with same scene exposure, and you end up with very similar looking outcomes irrespective of the 1 stop ISO difference

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PicPocket