Re: digital pinhole?

Wow, I didn't know aboiut any of this specialized digital equipment --
thanks for the information! I'm still not going out to buy a new digital
camera, but I will consider some older models that are now getting dirt
cheap, especially used.

R.J.

-----Original Message-----
From: luish m. coelho <luish@ignore.com.br>
To: pinhole-discussion@pinhole.com <pinhole-discussion@pinhole.com>
Sent: Tue Dec 10 18:38:12 2002
Subject: Re: [pinhole-discussion] digital pinhole?

hi,

CCDs have a property of reading heat as much as reading light, since
heat has also its waveform.

long exposures makes the CCD surface get moisty, I believe that this is
why we get those dots, they are from the heat interference.

so, you need a CCD made for long exposures which is called cooled CCDs.

they may be found in cameras used for astronomy (pinholes whatching the
stars!!!!).
http://www.sbig.com/

I suggest you take a look at this animation of a comet made with a CCD:
http://user.icx.net/~mfleenor/ccd/07032000_0800ani.html

[]s
luish

http://www.ignore.com.br

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Received on Tue Dec 10 21:39:16 2002