So what's the 'fact' about 40D noise, Vs. 30D?

Has anyone experimented with the noise-supression mode? Turned it on and noticed that my buffer went from 14 to 6 shots or something.
Anyone any links to a good description of what it does / how it works? (Didn't find anything interesting on the Canon site or via Google).

Where I find the 40D really shines is at 3200.

1600 is ok, but I find 3200 isnt that much of a jump from 1600 in terms of noise, which is fantastic considering I do low light all the time and i used to consider 3200 unusable.
See below. Shot at 3200. 1/100, 50mm, f/2.2

agent.media wrote in post #4174923
Where I find the 40D really shines is at 3200.

1600 is ok, but I find 3200 isnt that much of a jump from 1600 in terms of noise, which is fantastic considering I do low light all the time and i used to consider 3200 unusable.
See below. Shot at 3200. 1/100, 50mm, f/2.2

Very acceptable for a ISO3200 IMO. I apologize that I can't contribute to this thread because I don't have a 30D to compare. Since 5D is mentioned in the conversation, I've took two pics quickly for comparison purpose, one from 40D and the other from 5D under a VERY low light condition. I am not sure whether this is the best way to test for noise, however I have kept all the settings the same for both camera, both hand held and no PP. (Sorry, too lazy to setup tripod this late at night)

The environment that it was taken (manually adjusted, so it's as close as it can get):

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High ISO comparison for some of the cameras mentioned above:

http://www.the-digital-picture.com …al-SLR-Camera-Review.aspx

Roger-Walker wrote in post #4174896
Has anyone experimented with the noise-supression mode? Turned it on and noticed that my buffer went from 14 to 6 shots or something.
Anyone any links to a good description of what it does / how it works? (Didn't find anything interesting on the Canon site or via Google).

It basically takes a second "null" exposure at the same shutter speed and uses that to neutralize hot spots. The extra time and PP this requires is what knocks down your buffer size.

Jon wrote in post #4176798
It basically takes a second "null" exposure at the same shutter speed and uses that to neutralize hot spots. The extra time and PP this requires is what knocks down your buffer size.

I think you are confusing long exposure NR and the new high iso NR in the 40D. The high ISo NR in the 40D knocks the buffer down because of the extra processing required for the better noise suppression algorithms. You can still shoot 6 frames in 1 second, but then you have to wait a little for the next burst.

Have you any proof they don't use blank-frame methods for High ISO as well as LENR? I know my 5D had NR implemented at essentially all shutter speeds slower than 1/250 even though it wasn't billed as a feature. And it's going to be difficult to knock down noise without masking detail by any means other than blank-frame subtraction.

I don't think they do. I can still shoot a burst at 1600 iso with now slowdown until about the 6-7th shot when high ISO NR is enabled.

But at fast shutter speeds, it isn't the capture of the blank frame, rather the post-processing, that takes the time.

Jon wrote in post #4177675
Have you any proof they don't use blank-frame methods for High ISO as well as LENR? I know my 5D had NR implemented at essentially all shutter speeds slower than 1/250 even though it wasn't billed as a feature. And it's going to be difficult to knock down noise without masking detail by any means other than blank-frame subtraction.

Well, noise ninja and neat image can do it without blank frame subtraction. Secondly, the excerpt from the 40D white paper suggests to me that there is a difference in the technique. I guess it's a judgement call, but:


Long exposure noise reduction is equal on the EOS 40D and 30D cameras. [Off], [Auto],
or [On/always applied] can be selected. The time required for noise reduction processing
is equal to the duration of the original exposure; the next photograph cannot be
shot until noise reduction processing in progress is complete.
High ISO noise reduction (C.Fn II-2) can be used for images taken at a high ISO speed,
as with the EOS-1D Mark III. Although some noise reduction is applied at all ISO speeds,
it is particularly effective at high ISO speeds. However, at low ISO speeds, noise in the
shadow areas is, in fact, further reduced. Also, when [High ISO speed noise reduction]
is set, the maximum burst during continuous shooting will decrease to 8, regardless of
the image-recording quality.

From the 1dm3 whitepaper:
Also, the second-generation, on-chip noise removal circuit and a
newly-developed noise reduction technology combine to remove
noise effectively. To achieve even less noise, the EOS-1Ds Mark III
has a new output amp that attains both high speed and low noise.
Low noise is also achieved with an improved manufacturing
process, optimized pixel amp, and optimized reading circuit.