Clark,

Not having to cover the scope during dark frames is supposed to be a selling
point of a camera with a mechanical shutter. I was initially curious about
this myself, so I did some tests. Inside, with the camera pointed at a
light fixture on the ceiling, I did a 10 minute dark frame without any kind
of cover. I then repeated with an opaque film canister pushed over the nose
piece. Results: the dark frames were identical. I never cover the 'scope
to do dark frames.

Bob
http://www.usit.com/rfreeze
-----Original Message-----
Date: Wednesday, April 29, 1998 2:04 PM
Subject: [M]: 416XT & Dark Frames


>I was wondering about something. Since the 416XT is shuttered, do you
>need to cover the scope when you dark frame or is the shutter 'good
>enough'?
>
>If it is NOT good enough to just use the shutter, what are the
>collective 'you' using to cover the scope during dark frames?
>Clark Williams
>
>

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