Re: [ATM] webcam and foucault test?

[Michael Lindner <mikell@optonline.net>]

On Fri July 21 2006 2:10 pm, Mike Lockwood wrote:
> Summary - I much prefer viewing with a small telescope (say 3x).

My experience is quite to the contrary, although I must tell you the foucault 
tester I've used has a very nice Astrovid camera with a 35mm camera zoom lens 
mounted on it. The nice features about this setup are that the image can be 
zoomed until the mirror fills the screen, and the gamma of the camera can be 
adjusted to bring out very subtle details. While the readings from this setup 
are different from what I get by eye with the same tester, the deltas between 
readings are nearly identical, and star tests verify that the tester is 
accurate.

No doubt the difference is the bargain webcam versus the $900 Astrovid + zoom 
lens combo. I'm sure there's a happy medium in between. Mike, thanks for 
sharing your experience.

Clear skies.
-- 
Michael Lindner
http://www.starastronomy.org *** http://home.att.net/~mikel
http://www.atmsite.org *** http://www.atmlist.net
_______________________________________________
ATM mailing list http://www.atmlist.net/