ISO on the R5

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.

Maybe there was a misunderstanding on that. It sounds correct that, at various points the ISO performance can get better as you bump it up (for example 320 to 400 or 500) but I'd be surprised to see that occur at every full stop increment. I don't know the "nuts and bolts" of how dual gain technology works, but it could fall in the bucket you mentioned and that would back up a portion of the claim. But again... not sure its that way at every full stop.

FYI

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.

Tazz93 wrote:

Maybe there was a misunderstanding on that. It sounds correct that, at various points the ISO performance can get better as you bump it up (for example 320 to 400 or 500) but I'd be surprised to see that occur at every full stop increment. I don't know the "nuts and bolts" of how dual gain technology works, but it could fall in the bucket you mentioned and that would back up a portion of the claim. But again... not sure its that way at every full stop.

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I’m only reporting what the man told me, and I have not conducted laboratory testing of his comments. But I did not misreport what he told me.

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.

• Hgossamer88 wrote:

FYI

That has absolutely nothing to do with my post.

While I generally like Mr. Northrop, I don’t think this video is very useful because he’s only demonstrating the noise that occurs when you boost brightness in post. It’s Stupid 101, because the real comparison is when you take two images which are exposed with the same lightness, using different ISO settings to obtain the same result. He didn’t even make one of those comparisons, so personally, I think he makes a useless explanation which does not help the photographer gain an understanding of how a higher ISO/lower exposure choice will impact the photograph, which is the ONLY THING THAT MATTERS here. Not “How does it work?” (Answer: I don’t care) but “How will it affect the photograph? (Answer: I need to know this!)

MarshallG wrote:

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.

Yes, I see it's a Canon rep's claim not yours, I'm just saying it's very easy to verify.

MarshallG wrote:

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.

But why post it here without checking the facts ?

BobKnDP wrote:

gossamer88 wrote:

FYI

Is this related to the person who posted some weeks back under the handle "vegetable"?

I presume that this is a trolling post.

Umm..what? Trolling? I thought the video was helpful.

Rawpaul wrote:

MarshallG wrote:

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.

But why post it here without checking the facts ?

Why not report what the camera manufacturer states?

gossamer88 wrote:

BobKnDP wrote:

gossamer88 wrote:

FYI

Is this related to the person who posted some weeks back under the handle "vegetable"?

I presume that this is a trolling post.

Umm..what? Trolling? I thought the video was helpful.

The video isn’t related to the issue.

MarshallG wrote:

gossamer88 wrote:

BobKnDP wrote:

gossamer88 wrote:

FYI

Is this related to the person who posted some weeks back under the handle "vegetable"?

I presume that this is a trolling post.

Umm..what? Trolling? I thought the video was helpful.

The video isn’t related to the issue.

That's all you needed to say and not accuse me of trolling.

I know the R5 is a much newer sensor.  I have heard this about my RP’s sensor which is older and from the 6DII.  I seem to recall seeing charts from DXO or Photons to Photos or something that supported the claim (full stop ISO adjustments handle noise and preserve dynamic range better) in the RP.

Further, along the lines of the Northrup video posted, the RP does a much better job with higher ISO in camera than it does with lifting shadows in post when it comes to handling noise.

But again, not sure if that applies to the R5. I’m curious if the rep was just giving their usual Canon spiel that they’ve done for years and maybe not considering improvements?   Or maybe it’s still modestly true at pixel peeping levels.

gossamer88 wrote:

MarshallG wrote:

gossamer88 wrote:

BobKnDP wrote:

gossamer88 wrote:

FYI

Is this related to the person who posted some weeks back under the handle "vegetable"?

I presume that this is a trolling post.

Umm..what? Trolling? I thought the video was helpful.

The video isn’t related to the issue.

That's all you needed to say and not accuse me of trolling.

It was someone else who called you the T word.