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Old 08-02-2009, 07:35 PM
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strongmanmike (Michael)
Highest Observatory in Oz

strongmanmike is offline
 
Join Date: May 2006
Location: Canberra
Posts: 17,173
Quote:
Originally Posted by gregbradley View Post
That is amazing Mike.

How long did it take to get there?

The Microline is like that too. I can get -35C almost anytime but that's a much smaller chip. It takes about 2-3 minutes to get down that low.

Greg.
It got to about -30C (ie delta 57C) in about 2-3min but then took another few minutes to slowly drop to the final resting point of -34.7 so all up perhaps 10min? But that includes waiting untill I was happy that it wasn't dropping any further so most likely it took about 6-7min or so..?

I also rested the camera body with its thinnest edge against the table to allow the body most contact with air for heat disipation but at the scope it would have been hanging in the air freely and maybe even in a slight breeze so perhaps even a few more decimal points of cooling may be possible..?

A delta cooling of some 62C is pretty good though and very handy.

Mike
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