Mark, the temperature is not low enough - you really nead to get it down
to -10 or better to reduce the dark current. My own 416 would be just as
noisy at that temperature. It's also not stable, so it's not surprising
dark frame does not 'cancel out'.

Chris Heapy

>----------
>Sent: 23 September 1998 03:56
>Subject: [M]: 416 Dark Frame seems noisy
>
>I recently got a 416 XT unit this summer and finally got a chance to
>play with it. It seems that my images have an exceptional amount of
>white noise. Many, many white dots across the image (even on the dark
>frame). Unfortunately when I subtracted the (noisy) dark frame from the
>image, the white dots didn't seem to cancel out.
>
>Could I please send (via private e-mail) a sample dark frame to a more
>experienced CCDer or 416 user? Im not sure whether I have a hardware
>problem or whether I just misconfigured the unit some how. I have a jpeg
>of the image that is about 100k.
>
>For reference I am using a SCSI connection to my thinkpad, the Adaptec
>1460B slimscsi card, and I was running the camera at about 0 degrees
>(C).
>
>Thanks for your help.
>
>
>Mark
>

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