Artificial Star and the Edge 8" SCT

Equipment Collimation
4 replies•164 views
Jerry Gerber avatar
Jerry Gerber avatar
I am thinking of buying theGeoptik Artifiicial Starfor collimation.    Does anyone know what the minimum focus distance would be for the Edge 8, both with and without the .7 reducer?  I only have about 50 or 60 feet in my backyard so I don't know if I can even focus that close..

Thanks!
Jerry
Well written Engaging
andrea tasselli avatar
andrea tasselli avatar
10x your focal lenght in the first case and 12x in the second one.
Jerry Gerber avatar
Jerry Gerber avatar
andrea tasselli:
10x your focal lenght in the first case and 12x in the second one.

OK, thanks Andrea!    Is it 12x2032mm and 10x1422mm, or is it 10x2032mm and 12x1422mm?
Well written
andrea tasselli avatar
andrea tasselli avatar
Jerry Gerber:
OK, thanks Andrea!    Is it 12x2032mm and 10x1422mm, or is it 10x2032mm and 12x1422mm?


The latter one. Mind you, this is just for collimation purposes. For optical testing it would be twice that.
Jerry Gerber avatar
Jerry Gerber avatar
andrea tasselli:
Jerry Gerber:
OK, thanks Andrea!    Is it 12x2032mm and 10x1422mm, or is it 10x2032mm and 12x1422mm?


The latter one. Mind you, this is just for collimation purposes. For optical testing it would be twice that.

Alright, good to know.  It's just for collimation, not optical testing.
Well written Respectful
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