Re: [APML] co-efficient of expansion for 10" SCT

[Alan Voetsch <alanv12952@yahoo.com>]

Hey Duncan,

 Doc G. is probably the guy most likely to have done this. You could
try posting your question on MAPUG to see if he, or someone else has an
answer for you. I do remember that he had even gone as far as measuring
contraction/expansion OTA potentials from the nearby heat of a human
body on a cold night.

Alan

--- Duncan Munro <dmunro@sfu.ca> wrote:
> Has anyone calculated the co-efficient of expansion for a 10" SCT?   
> I've done some rough  testing with my 10" F6.3 OTA and I'm getting
> about 
> .15mm per deg C.  Does this sound plausible?



SCT Astrophotography: http://www.pbase.com/avoetsch/astrophotography
FS-102 G-11/Gemini: http://www.pbase.com/avoetsch12952/tak_fs102
& http://www.pbase.com/avoetsch12952/fs102
& http://www.pbase.com/avoetsch12952/takpf

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