----- Original Message -----
From: "Joe Gwinn" <joegwinn@xxxxxxxxxxx>
> I'm sure the details are a trade secret, but none of these sensors
> are close to the theoretical limit (photon shot noise), instead being
> limited by electrical self-noise of one kind or another. My
> impression is that this is often in the image sensor itself, rather
> than the amplifier. I base this on the observation that astronomical
> CCD sensors are often limited more by CCD self-noise than photon
> noise, and these CCDs and amplifiers are the best that can be built
> with current technology, for any amount of money.
>
<snip>
>
> The bottom line seems to be that color fidelity (and perhaps tonal
> resolution) turned out to outweigh noise. For me, this is the most
> interesting result so far. Many people have focused on noise, or the
> lack of noise, and this may have been misdirected.
>
I'm not in this field, if not the amplifer, not the sensor then what? So far
I didn't see the 10D is sacrificing the resolution for noise, it's
resolution is better than E-1.
> >
> >The original scene was not really low contrast as indicated by the blue
sky.
> >In my experience most slides will not be able to provide this capture
range.
>
> Seeing only the photograph, it's hard to see what the original
> brightness range was. You have the experience there; I would assume
> that your judgement that slide film would be exceeded is correct.
>
Checking with the original shooting data, it was ISO100, F4, 1/800s, 12:30
noon time.
> I just assumed that because the British like rainy, overcast places,
> they chose Hong Kong, which explained why there were no sunlit photos.
>
Try here, in summer time from June to Oct, the day time temperature is
around 30-33 deg. C. In the photo you can see some peoples are holding an
umbrealla, not for the rain but sunlight.
>
> Photoshop can do anything but take the picture. From earlier
> postings, you take the picture in RAW mode, and do all processing in
> Photoshop?
All E-1 shots in my web site are JPEG, no color correction, only contrast
adjusted.
http://www.accura.com.hk/OM/E1.htm
Below test photo was shot with RAW, straightly converted by Olympus View
under shot setting of low contrast, low sharpness, auto white balance, save
as TIF and then coverted to JPEG by PS.
http://www.accura.com.hk/P5301309.jpg (1.2MB original pixel)
C.H.Ling
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