I think that when using standard CCD cameras rather than cooled CCDs they make
multiple shorter exposures and join them in software. This reduces noise, which is one
of the reasons for cooling the CCD.
Nick
-----Original Message-----
From: "Keith Whaley"<[EMAIL PROTECTED]>
Sent: 19/09/04 21:28:42
To: "[EMAIL PROTECTED]"<[EMAIL PROTECTED]>
Subject: Re: Damaging a CCD?
Alexander Grigolia, Jr wrote:
> Joe,
>
> This time limit seems strange to me!
>
> Amateur astronomers routinely make 30-minute, 45-minute, and longer
> exposures with telescope-mounted CCD cameras!
>
> Alex Grigolia
Their CCDs are cooled, are they not?
I think that's the limiter...
keith whaley
>
>
> On Sunday, September 19, 2004, at 01:09 PM, Joseph Tainter wrote:
>
>> Page 50 of the October issue of Pop Photo has the following statement
>> (in reviewing the Fuji Finepix S3):
>>
>> "...a black-and-white image is output through the S3 Pro's video
>> connector. (This signal lasts for 30 seconds to prevent CCD damage.)"
>>
>> Do long exposures damage a CCD? Any of you heard anything about this?
>>
>> Thanks,
>>
>> Joe
>>
>
>
>
