Lots of discussions on internet message boards regarding the Digital
Rebel XTi (EOS 400D) exposure. Some say it's regularly underexposing
shots. Others say it's exposing properly, and that the previous
iterations of Canon dSLRs were overexposing. Regardless...
Is the difference in exposure simply because of a more conservative
metering system on the 400D? Or is it because the new 10 MP sensor is
less sensitive to light?
To make matters worse, the 400D is supposed to follow a different tone
curve than the 350D. That makes direct comparisons between the 400D
and the 350D a bit more complicated.
Can anybody shed a light on this subject?
David Kilpatrick - 18 Oct 2006 14:39 GMT
> Lots of discussions on internet message boards regarding the Digital
> Rebel XTi (EOS 400D) exposure. Some say it's regularly underexposing
[quoted text clipped - 10 lines]
>
> Can anybody shed a light on this subject?
Yes, the JPEGs are very flat and dark if you use Natural or Faithful
colour. It picks up a lot if you switch to Standard colour, or one of
the more vivid/specialised modes.
The images are high in dynamic range, which by definition means they
will tend to look flat. You can't cram more tonal range into the pic
without compressing contrasts.
The new sensor is certainly less sensitive, it has smaller pixel wells,
and in physical terms that means fewer photons hit each pixel in the
same time. It is bound to be less sensitive. The issue is never
absolutely down to sensitivity, but to noise/signal ratio.
I can however say for sure that 400D JPEGs, out of the camera with
normal exposure and neutral settings, are flatter and duller than 300D
or 350D. But the raw files have a deal of excellent information in them
and you can extract an excellent result using a strong tone curve.
David
Peter Wehle - 18 Oct 2006 15:12 GMT
plastic_razor@yahoo.com schrieb:
> Lots of discussions on internet message boards regarding the Digital
> Rebel XTi (EOS 400D) exposure. Some say it's regularly underexposing
> shots. Others say it's exposing properly, and that the previous
> iterations of Canon dSLRs were overexposing. Regardless...
> Can anybody shed a light on this subject?
Well, i own a 350D since May `06 and in my opinion she`s a little
overexposing. I only use the P position for standard photos. But one can
get it under control :). For I let her save RAW and JPEG simultaneously.
Greetings, Peter (Berlin)