On May 9, 2004, at 7:16 AM, Andrew Gullen wrote:
>
> The exposure time suggests that there is some kind of IR filtering in
> the
> camera - even 750 would give about 1/30 or so at 5.6 (maybe a bit
> slower -
> I've tested with an 092, while the R72 is an 87C, right?) and most
> digital
> cameras are supposed to be pretty IR-sensitive. Can anyone chime in on
> CCD
> vs. CMOS and which the E-1 uses?
>
> Bottom line seems to be that you can take usable IR but it's slow, and
> the
> tonal values will be less dramatic than an IR film.
>
>
The E-1 uses a Kodak CCD. Both CCD and CMOS sensors are much more
sensitive to infra red than film and all manufacturers filter it out
with the filter on top of the sensor in order to get normal looking
images. The amount of filtering varies according to the goals of the
manufacturer for image quality. You don't want to be blowing out the
red channel every time there is a red flower in the picture. Some
cameras are better than others with IR.
Some people are playing with the other end of the spectrum, ultra
violet, which is very interesting color wise.
http://www.naturfotograf.com/index2.html
Winsor
Long Beach, California
USA
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