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Old 02-04-2008, 11:07 AM
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mrsnipey
Verified Astronomy Noob

mrsnipey is offline
 
Join Date: Sep 2007
Location: Corinda, Australia
Posts: 199
Low profile focuser instead of moving primary up tube.

Hi all, I have a 12" dob and I want to do Astro-Photography with it using my Canon DSLR.
I've read that people move their mirrors up the tube but would I be able to just replace
my focuser with something like a "Bintel Crayford Focuser Low Profile 10:1" to get to focus?

I don't really want to move the mirror if I can avoid it.
If I do have to move the mirror, how do I calculate how much I have to
move it up the tube? Any help would be appreciated.

(Unsteady hands + bad metal working skills = recipe for disaster)

Thanks,
Denis.
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