Hey everyone,
I would like to know which one to buy in order to collimate my 10" GSO Newtonian properly?? (
http://www.catseyecollimation.com/ht...llimation.com/)
Also I would like to know, as I push the primary mirror about 3.5cm closer to the secondary.... (So that my DLSR can get into focus) do i need to increase the size of the secondary mirror??
Hope to hear from anyone....
Thanks in advanced