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ISO on the R5

Started 10 months ago | Discussions thread
MarshallG
OP MarshallG Veteran Member • Posts: 8,951
Re: ISO on the R5

Quarkcharmed wrote:

MarshallG wrote:

Disclaimer: I’m only the messenger.

I’m at a trade show all weekly so I stopped in the Canon booth and spent a long time talking with one of their experts about the R5.

He then me that the R5 sensor slightly boosts voltage as you increase ISO, and it did so in one stop increments. Intermediate ISO changes are made post sensor read, so he said that you can get a cleaner image at a higher ISO setting that falls on a full stop boundary, than on an ISO setting which is between 1/3 to 2/3 stop lower.

Again, I’m just relaying what the man told me. Don’t flame me, I’m just reporting.

It's very easy to verify following this article

https://www.rawdigger.com/howtouse/iso-is-seldom-just-digital-gain

AFAIK it was true for some very old cameras but now most of the ISO range (except the 'extended' parts) is implemented through the variable analog gain.

Again, I’m only reporting what the representative from Canon told me (“You’re welcome”) and I have not looked at a bunch of bar charts to confirm his statement. I’m just telling you what he said.

 MarshallG's gear list:MarshallG's gear list
Canon EOS R5 Canon EF 50mm F1.4 USM Canon EF 85mm F1.8 USM Canon EF 16-35mm F2.8L II USM Canon Extender EF 1.4x II +4 more
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