GH5 vlog @ ISO 3200 vs CineD?

F

filmguy123

Veteran
on first firmware, big problems with high ISO vlog.

Seems to be ok now. Any thoughts on high ISO vlog VS high ISO cineD? I've shot both BRIEFLY and the vlog seems to hold up ok... the CineD seems to lose some key dynamic range even in indoor high ISO settings.

Anyone have more in depth thoughts or expertise on best practices here?
 
V-log ISO numbers are NOT THE SAME as Cine-D ISO. The native ISO of V-log mode is 400, twice the native ISO 200 of Cine-D mode. With V-log, Panasonic followed Sony's example of arbitrarily scaling their LOG profiles with doubled ISO numbers. To compare noise levels of V-log to Cine-D footage, the Cine-D footage should be shot at half the ISO level as the V-log footage.
 
Thank you, this is quite helpful.

Does this suggest that vlog ISO 3200 may be the equivalent of CineD ISO 6400?

Why does vlog 3200 not look as bad as CineD 6400?
 
But note that quality factors don't scale linearly, or even predictably, between ISO jumps, so trying to compare VLOG-L ISO X to Cine-D ISO X on paper isn't productive. You have to actually test and evaluate the results.
 
Lpowell said:
The native ISO of V-log mode is 400, twice the native ISO 200 of Cine-D mode
Click to expand...

Is that really true, though. Isn't the sensor's native ISO 400, with Cine-D simply allowing you to go below native ISO? Like some video camera's allow -3dB gain?

The BMPCC's native ISO is 800, but we can go to 400 and even 200 if needed. It's still an 800 ISO native sensor, which is where you get the greatest dynamic range.
 
Jim Simon said:
Is that really true, though. Isn't the sensor's native ISO 400, with Cine-D simply allowing you to go below native ISO? Like some video camera's allow -3dB gain?

The BMPCC's native ISO is 800, but we can go to 400 and even 200 if needed. It's still an 800 ISO native sensor, which is where you get the greatest dynamic range.
Click to expand...

DXOMARK found the GH4 to have the most dynamic range for video at 200 ISO, 100 ISO for stills.

https://www.dxomark.com/panasonic-lumix-dmc-gh4-sensor-review-heavyweight-contender

I always try to shoot at 200 as it's very clean. You can underexpose a little and not get bad noise in the shadows when you lift it. Can't do that with 800, and I usually have to overexpose a little in 800 to minimize noise, which lowers the dynamic range.
 
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Hi Batutta, why do you need to overexpose a little in 800 to minimize noise?

Is this overexposing but without crushing/blowing any part of the image, you are just basing overexposure on the exposure scale?
 
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