High ISO speed noise reduction: also RAW?

This can be selected under C.Fn II -2. The manual of the 40D says: "Reduces the noise generated in the image. Although noise reduction is applied at all ISO speeds, it is particularly effective at high ISO speeds." Does this also apply to RAW images or only JPG? The manual does not say ... Thanks!

That's a good question and I remember reading somewhere that it only affects jpeg. I could be wrong though. I don't remember where I read it but I'm pretty sure it was on this forum.

I am gonna say only jpeg.
Keep in mind that your camera does a poor job at noise reduction compared to your computer and simple software which has to see the photos anyway. (unless your big on that nifty print button)

I dont know what camera youve got but mine actually does a pretty acceptable job with High ISO NR.

To answer the OP, it wont effect a raw image but it will still reduce your buffer even if youre only shooting in raw

Definitely only jpg....except that like other jpg only settings the metadata notation affects DPP's defaults, although this one can be cancelled in Preferences.

AdamLewis wrote in post #8306681
I dont know what camera youve got but mine actually does a pretty acceptable job with High ISO NR.

To answer the OP, it wont effect a raw image but it will still reduce your buffer even if youre only shooting in raw

Compared to your computer and software?

mikeassk wrote in post #8306990
Compared to your computer and software?

Yeah. The camera does a pretty good job. I guess it depends on your standards though. Im not one who is looking for glass-like images from 6400 ISO..

only highlight tone priority changes the RAW image because it shoots at different ISOs. other than that, not even picture style etc influences the pure raw picture.

Thanks to all for input. I asked because I had dedicated C1 to M + ISO extension + high ISO noise redcution, but now I can delete these and dedicate C1 to something else.

AdamLewis wrote in post #8307072
Yeah. The camera does a pretty good job. I guess it depends on your standards though. Im not one who is looking for glass-like images from 6400 ISO..

Point noted,
ISO 6400 is quite high.
I use a 1DIII and 20/40D and whenever i "have" to shoot that high I usually just lower my expectations.

cfibanez wrote in post #8306399
This can be selected under C.Fn II -2. The manual of the 40D says: "Reduces the noise generated in the image. Although noise reduction is applied at all ISO speeds, it is particularly effective at high ISO speeds." Does this also apply to RAW images or only JPG? The manual does not say ... Thanks!

Your answers:

1. It is performed by DiGiCIII, and it is done during or past raw-to-rgb conversion, on board the cam.

2. It is stored as a metadata in exif, thus not being applied to RAW data.

3. IT WILL BE replicated, VERBATIM, by converting the .CR2 with Canon's ZB/RIT.

4. On-board noise-reduction is ideal for ISo800-1250 (on 40D) and up to ISO1600 on 1D3, because it takes out Chroma-channels noise, and leaves Luma pretty much intact. This means not good enough past ISo1250-1600.

5. On 1D3, once active, it will kill your buffering capacity for high-speed shooting, whether raw or .JPG.

Cheers,

PIX

PIXmantra wrote in post #8309055
Your answers:

1. It is performed by DiGiCIII, and it is done during or past raw-to-rgb conversion, on board the cam.

2. It is stored as a metadata in exif, thus not being applied to RAW data.

3. IT WILL BE replicated, VERBATIM, by converting the .CR2 with Canon's ZB/RIT.

4. On-board noise-reduction is ideal for ISo800-1250 (on 40D) and up to ISO1600 on 1D3, because it takes out Chroma-channels noise, and leaves Luma pretty much intact. This means not good enough past ISo1250-1600.

5. On 1D3, once active, it will kill your buffering capacity for high-speed shooting, whether raw or .JPG.

Cheers,

PIX

Thanks for this PIX!

mikeassk wrote in post #8307130
Point noted,
ISO 6400 is quite high.
I use a 1DIII and 20/40D and whenever i "have" to shoot that high I usually just lower my expectations.

6400 is my bread and butter. Shoot to the right and pull back in post. Looks like 1600 and amazes me everytime.

tzalman wrote in post #8306682
Definitely only jpg....except that like other jpg only settings the metadata notation affects DPP's defaults, although this one can be cancelled in Preferences.

Just to clarify, ALL metedata settings that can be applied to RAW can be overrided or altered during conversion, even in DPP.

PIXmantra wrote in post #8309055
5. On 1D3, once active, it will kill your buffering capacity for high-speed shooting, whether raw or .JPG.

With my 1D Mk III at ISO 6400, switching C.Fn. II-2 to On reduces the displayed buffer from 22 down to 14, about a 36% reduction, even in RAW mode.

I'm perplexed by this, since it's not converting the shot to JPEG and therefore not reducing any noise. Why would activating this function in RAW mode reduce the buffer?