On 20/10/06, Patrick Genovese <[EMAIL PROTECTED]> wrote:
> Hi,
>
> Has anyone had experience with really long exposures on DSLRs ie
> exposures running into several minutes maybe even hours.

Long exposures are not advisable. Sensor noise is cumulative so
eventually every (working) pixel will saturate due to it's own self
noise.

> I've heard here and there that such long exposures are not
> reccommended due to risk of damage to the sensor..  Is this true ?
> i've tried a few searches on the subject but could not find any
> conclusive information.

Not if the integrated light value is correct for the particular exposure.

-- 
Rob Studdert
HURSTVILLE AUSTRALIA
Tel +61-2-9554-4110
UTC(GMT)  +10 Hours
[EMAIL PROTECTED]
http://home.swiftdsl.com.au/~distudio//publications/
Pentax user since 1986, PDMLer since 1998

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