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Subject: Re: [M]: RE: Pictor 416XT
From: Merlin
Reply To: mapug@shore.net
Date: Sat Apr 05 02:09:33 1997

> The Pictor 416XT and 1616XT cameras continue to be equipped with the same
> NON anti-blooming gate (ABG) Kodak imaging chip as earlier Pictor 416
> and 1616 cameras. Instead, blooming is controlled through software that takes
> a sample image to calculate the maximum exposure time and automatically
> adds exposures to reach the exposure time requested by the user. On chip
> anti-blooming as implemented by Kodak has significant advantages while at the
> same time, adding significant disadvantages.
>

Now I understand why 416XT images have so much noise despite long
exposures. The use thinks he is taking a long exposure but is really
getting a series of short exposures added together - which does very
little eliminate noise. For more on this topic, see

http://www.skypub.com/ccda/ccdalib/signoise.html

-Paul

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