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Archive 20097D noise vs 50D numbers
p.1 #17D noise vs 50D numbers
I haven't found any detailed numbers yet...are there any official measures of how many fractions of a stop better the noise is than the 50D? It certainly looks somewhat improved.
Sep 01, 2009 at 09:21 AM
p.1 #27D noise vs 50D numbers
I'd love to see it too. So far this 7D has most of the specifications from 60D. Not sure why they decided to change their numbering system. Doesn't make any sense! If you don't follow Canon's line it's maybe very confusing for those who just want to buy a camera and need a few choices.
As for ISO noise, they didn't go for 25K so maybe it was all left at the level of 50D. 50D noise performance was a failure and at ISO 1600-3200 didn't really deliver any better performance than my good ol' 40D.
As for ISO noise, they didn't go for 25K so maybe it was all left at the level of 50D. 50D noise performance was a failure and at ISO 1600-3200 didn't really deliver any better performance than my good ol' 40D.
Sep 01, 2009 at 09:55 AM
p.1 #37D noise vs 50D numbers
Errrrmmm..
How can the 7D have most of the specs from a non existent camera?
How can the 7D have most of the specs from a non existent camera?
Sep 01, 2009 at 09:58 AM
p.1 #47D noise vs 50D numbers
reason wrote:
I'd love to see it too. So far this 7D has most of the specifications from 60D. Not sure why they decided to change their numbering system. Doesn't make any sense! If you don't follow Canon's line it's maybe very confusing for those who just want to buy a camera and need a few choices.
As for ISO noise, they didn't go for 25K so maybe it was all left at the level of 50D. 50D noise performance was a failure and at ISO 1600-3200 didn't really deliver any better performance than my good ol' 40D.
Yes but the specs from the 60D came from the 3D
I'd love to see it too. So far this 7D has most of the specifications from 60D. Not sure why they decided to change their numbering system. Doesn't make any sense! If you don't follow Canon's line it's maybe very confusing for those who just want to buy a camera and need a few choices.
As for ISO noise, they didn't go for 25K so maybe it was all left at the level of 50D. 50D noise performance was a failure and at ISO 1600-3200 didn't really deliver any better performance than my good ol' 40D.
Yes but the specs from the 60D came from the 3D
Sep 01, 2009 at 10:00 AM
p.1 #57D noise vs 50D numbers
Ok, you asked for it.
I dissected a sample raw file from imaging-resource.com at ISO100, no NR, with IRIS.
It appears that the non-illuminated pixels are included in the file.
Found some numbers.
The Black Level offset is changed to 2048 (used to be 1024)
The read noise Sigma is around 4,7
The histogram maxes out with a barrier at 13580.
BL subtracted: Saturation at ADU 11532
Dynamic Range: 11,26 stops.
Dynamic Range normalized to 8 MP: 11,85 stops
Note that this doesn't tell anything about photon collection efficiency, as the system gain is unknown.
Neither does it tell anything about SNR.
I dissected a sample raw file from imaging-resource.com at ISO100, no NR, with IRIS.
It appears that the non-illuminated pixels are included in the file.
Found some numbers.
The Black Level offset is changed to 2048 (used to be 1024)
The read noise Sigma is around 4,7
The histogram maxes out with a barrier at 13580.
BL subtracted: Saturation at ADU 11532
Dynamic Range: 11,26 stops.
Dynamic Range normalized to 8 MP: 11,85 stops
Note that this doesn't tell anything about photon collection efficiency, as the system gain is unknown.
Neither does it tell anything about SNR.
Sep 01, 2009 at 11:51 AM
p.1 #67D noise vs 50D numbers
alundeb wrote:
Ok, you asked for it.
I dissected a sample raw file from imaging-resource.com at ISO100, no NR, with IRIS.
It appears that the non-illuminated pixels are included in the file.
Found some numbers.
The Black Level offset is changed to 2048 (used to be 1024)
The read noise Sigma is around 4,7
The histogram maxes out with a barrier at 13580.
BL subtracted: Saturation at ADU 11532
Dynamic Range: 11,26 stops.
Dynamic Range normalized to 8 MP: 11,85 stops
Note that this doesn't tell anything about photon collection efficiency, as the system gain is unknown.
Neither does it tell anything about SNR.
And in "simple" English this means...
Ok, you asked for it.
I dissected a sample raw file from imaging-resource.com at ISO100, no NR, with IRIS.
It appears that the non-illuminated pixels are included in the file.
Found some numbers.
The Black Level offset is changed to 2048 (used to be 1024)
The read noise Sigma is around 4,7
The histogram maxes out with a barrier at 13580.
BL subtracted: Saturation at ADU 11532
Dynamic Range: 11,26 stops.
Dynamic Range normalized to 8 MP: 11,85 stops
Note that this doesn't tell anything about photon collection efficiency, as the system gain is unknown.
Neither does it tell anything about SNR.
And in "simple" English this means...Sep 01, 2009 at 11:55 AM
p.1 #77D noise vs 50D numbers
Sorry,
The 7D will have essentially the same Dynamic Range at low ISO as the 5DII, but apparantely without the visually problematic pattern noise.
The 7D will have essentially the same Dynamic Range at low ISO as the 5DII, but apparantely without the visually problematic pattern noise.
Sep 01, 2009 at 11:59 AM
p.1 #87D noise vs 50D numbers
alundeb wrote:
Sorry,
The 7D will have essentially the same Dynamic Range at low ISO as the 5DII, but apparantely without the visually problematic pattern noise.
Me understand now
Sorry,
The 7D will have essentially the same Dynamic Range at low ISO as the 5DII, but apparantely without the visually problematic pattern noise.
Me understand now
Sep 01, 2009 at 12:00 PM
p.1 #97D noise vs 50D numbers
alundeb wrote:
Sorry,
The 7D will have essentially the same Dynamic Range at low ISO as the 5DII, but apparantely without the visually problematic pattern noise.
The same DR before taking into account the reduced DR of the 5DII caused by pattern noise, or after taking that into account?
Sorry,
The 7D will have essentially the same Dynamic Range at low ISO as the 5DII, but apparantely without the visually problematic pattern noise.
The same DR before taking into account the reduced DR of the 5DII caused by pattern noise, or after taking that into account?
Sep 01, 2009 at 12:10 PM
p.1 #107D noise vs 50D numbers
alundeb wrote:
Ok, you asked for it.
I dissected a sample raw file from imaging-resource.com at ISO100, no NR, with IRIS.
It appears that the non-illuminated pixels are included in the file.
Found some numbers.
The Black Level offset is changed to 2048 (used to be 1024)
The read noise Sigma is around 4,7
The histogram maxes out with a barrier at 13580.
BL subtracted: Saturation at ADU 11532
Dynamic Range: 11,26 stops.
Dynamic Range normalized to 8 MP: 11,85 stops
Note that this doesn't tell anything about photon collection efficiency, as the system gain is unknown.
Neither does it tell anything about SNR.
Can you put that in english for us
Ok, you asked for it.
I dissected a sample raw file from imaging-resource.com at ISO100, no NR, with IRIS.
It appears that the non-illuminated pixels are included in the file.
Found some numbers.
The Black Level offset is changed to 2048 (used to be 1024)
The read noise Sigma is around 4,7
The histogram maxes out with a barrier at 13580.
BL subtracted: Saturation at ADU 11532
Dynamic Range: 11,26 stops.
Dynamic Range normalized to 8 MP: 11,85 stops
Note that this doesn't tell anything about photon collection efficiency, as the system gain is unknown.
Neither does it tell anything about SNR.
Can you put that in english for us
Sep 01, 2009 at 12:17 PM
p.1 #117D noise vs 50D numbers
Yohan Pamudji wrote:
The 7D will have essentially the same Dynamic Range at low ISO as the 5DII, but apparantely without the visually problematic pattern noise.The same DR before taking into account the reduced DR of the 5DII caused by pattern noise, or after taking that into account?
The pattern noise is included in the noise figures for the 5DII. If the 5DII didn't have pattern noise, it would have a little bit more DR, but it is very difficult to quantify it.
alundeb wrote
Sorry,The 7D will have essentially the same Dynamic Range at low ISO as the 5DII, but apparantely without the visually problematic pattern noise.
The pattern noise is included in the noise figures for the 5DII. If the 5DII didn't have pattern noise, it would have a little bit more DR, but it is very difficult to quantify it.
Sep 01, 2009 at 12:33 PM
p.1 #127D noise vs 50D numbers
The Image wrote:
Can you put that in english for us
The 7D will have more dynamic range than the 50D, even at pixel level.
Can you put that in english for us
The 7D will have more dynamic range than the 50D, even at pixel level.
Sep 01, 2009 at 12:42 PM
p.1 #137D noise vs 50D numbers
alundeb wrote:
The Black Level offset is changed to 2048 (used to be 1024)
Isn't that the trick Nikon uses to makes its shadows look cleaner at high ISO?
The Black Level offset is changed to 2048 (used to be 1024)
Isn't that the trick Nikon uses to makes its shadows look cleaner at high ISO?
Sep 01, 2009 at 12:43 PM
p.1 #147D noise vs 50D numbers
keithreeder wrote:
Isn't that the trick Nikon uses to makes its shadows look cleaner at high ISO?
No, actually the opposite.
Nikon (in some cameras) use a very small Black Level offset.
By using a larger black level offset, Canon allows for recording all possible noise (and signal) even at very high ISO's.
alundeb wrote
The Black Level offset is changed to 2048 (used to be 1024)No, actually the opposite.
Nikon (in some cameras) use a very small Black Level offset.
By using a larger black level offset, Canon allows for recording all possible noise (and signal) even at very high ISO's.
Sep 01, 2009 at 12:52 PM
p.1 #157D noise vs 50D numbers
Ah - I wondered if I might have that 100% back-to-front!
Sep 01, 2009 at 12:56 PM
p.1 #167D noise vs 50D numbers
Check out lisy78's post at the bottom of the page on the 7D vs 5D2 pattern noise:
https://www.fredmiranda.com/forum/topic/809449/1
I think Brainiac should consider swapping his 5D2's for 7D's
https://www.fredmiranda.com/forum/topic/809449/1
I think Brainiac should consider swapping his 5D2's for 7D's
Sep 01, 2009 at 01:14 PM
p.1 #187D noise vs 50D numbers
Just go over to DPreview and look at the samples posted in the 7D preview ... they look very similar to my 50D images. Take a close look at the 1600 images ... I'm not seeing anything to lead me believe that the camera is going to come close to my 5DII.
Sep 01, 2009 at 02:56 PM
p.1 #197D noise vs 50D numbers
Sorry, but I didn't take the time to explain the difference between Dynamic Range and Signal/Noise Ratio. I can't explain every bit of signal processing and noise in every post with some technical aspects, but here is a good read:
http://theory.uchicago.edu/~ejm/pix/20d/tests/noise/
Dynamic Range is nowadays only relevant in pushing exposures and doing shadow recovery. It says next to nothing about overall nosie level.
http://theory.uchicago.edu/~ejm/pix/20d/tests/noise/
Dynamic Range is nowadays only relevant in pushing exposures and doing shadow recovery. It says next to nothing about overall nosie level.
Sep 01, 2009 at 03:01 PM
p.1 #207D noise vs 50D numbers
Daan B wrote:
I dissected a sample raw file from imaging-resource.com at ISO100, no NR, with IRIS.
it appears that the non-illuminated pixels are included in the file.
Found some numbers.
The Black Level offset is changed to 2048 (used to be 1024)
The read noise Sigma is around 4,7
The histogram maxes out with a barrier at 13580.
BL subtracted: Saturation at ADU 11532
Dynamic Range: 11,26 stops.
Dynamic Range normalized to 8 MP: 11,85 stops
Note that this doesn't tell anything about photon collection efficiency, as the system gain is unknown.
Neither does it tell anything about SNR. And in "simple" English this means...
"The Photon torpodoes might not work Capt'n"
alundeb wrote
Ok, you asked for it.I dissected a sample raw file from imaging-resource.com at ISO100, no NR, with IRIS.
it appears that the non-illuminated pixels are included in the file.
Found some numbers.
The Black Level offset is changed to 2048 (used to be 1024)
The read noise Sigma is around 4,7
The histogram maxes out with a barrier at 13580.
BL subtracted: Saturation at ADU 11532
Dynamic Range: 11,26 stops.
Dynamic Range normalized to 8 MP: 11,85 stops
Note that this doesn't tell anything about photon collection efficiency, as the system gain is unknown.
Neither does it tell anything about SNR.
And in "simple" English this means..."The Photon torpodoes might not work Capt'n"
Sep 01, 2009 at 03:18 PM