Dynamic range comparison?

[bad karma]

Is there a comparison of the dynamic range difference in cameras? I am particularly looking for a comparison of the 40D and XTi. I wanted to see how much of a difference there is :)

[Jim G]

I think dpreview has some dynamic range comparisons in some of their camera reviews... perhaps check it out.

[bad karma]

Thanks Jim, I just checked, no good :(

[spectral]

i know they are out there i have seen one with all the nikon cameras on it. havent seen one for canon

[bad karma]

i know they are out there i have seen one with all the nikon cameras on it. havent seen one for canon
Damn not good!

[gjl711]

The info is out there, I’ll poke around, but DR is pretty constant across all digital cameras and varies very little from camera to camera. For the XTi and the 40D it’s probably going to be identical as it’s pretty much the same chip as well.

[gjl711]

Dpreview has the data for both cameras.
http://www.dpreview.com/reviews/canoneos40d/page20.asp
http://www.dpreview.com/reviews/canoneos400d/page19.asp
As I thought, they are the same

[tzalman]

Dpreview has the data for both cameras.
http://www.dpreview.com/reviews/canoneos40d/page20.asp
http://www.dpreview.com/reviews/canoneos400d/page19.asp
As I thought, they are the same

? ? ? ?

Copied from the pages linked above -

400D/XTi:

Sensitivity Shadow range Highlight range Usable range
ISO 100 -4.9 EV 3.5 EV 8.4 EV
ISO 200 -4.9 EV 3.5 EV 8.4 EV
ISO 400 -4.9 EV 3.5 EV 8.4 EV
ISO 800 -4.9 EV 3.5 EV 8.4 EV
ISO 1600 -4.3 EV 3.5 EV 7.8 EV

40D:
Sensitivity Shadow range Highlight range Usable range
ISO 100 -5.7 EV 3.4 EV 9.1 EV
ISO 200 -5.7 EV 3.4 EV 9.1 EV
ISO 400 -5.5 EV 3.4 EV 8.9 EV
ISO 800 -5.5 EV 3.4 EV 8.9 EV
ISO 1600 -5.5 EV 3.4 EV 8.9 EV
ISO 3200 -4.0 EV 3.4 EV 7.4 EV

[gjl711]

Like I said.. Pretty much the same.:oops:;):D

[chauncey]

I would expect more dynamic range from a 14 bit camera as opposed to a 12 bit camera.

[tzalman]

I would expect more dynamic range from a 14 bit camera as opposed to a 12 bit camera.
It's the other way around. Higher bit depth does not cause greater DR, only breaks it up into smaller pieces. However, if you can produce greater DR in the hardware, either by raising the well saturation point (highlight range) or reducing noise (shadow range) you may need more bits so that the shadows can be written without banding.

[chauncey]

Than how do you explain it Elie?

[tzalman]

Than how do you explain it Elie?
Less noise. The bottom limit is the point where noise obscures shadow detail. (This is, unfortunately, a somewhat subjective determination, which is why you see so many different numbers for DR.) Reduce noise and you lower the DR floor.