First of all, if anyone knows of any free software that is mac-compatible which
could help
me answer these questions, please let me know. All I have been able to find are
programs
like Newt, designed for Windows.
I have an old 12.5" Starfinder dob that originally had a 1.25" focuser. The
specs for the
more recent 12.5" starfinders are: 60" focal length, 2" focuser, 2.60"
secondary. If I
remember right, the center of my secondary is 47" from the center of my primary.
I
replaced the secondary mirror with a 2.48", and I have bought a 2" focuser that
came off
of a 16" starfinder. What I want to know
is: when I bore
a new hole for the focuser (assuming this secondary and focuser can be used with
my
scope without wasting any light) how high up the tube should I place the
secondary mirror
and focuser? If my secondary mirror is smaller than the one that originally
came with the
scope, it seems like it should be a little bit further from the primary than the
original one
was.
could help
me answer these questions, please let me know. All I have been able to find are
programs
like Newt, designed for Windows.
I have an old 12.5" Starfinder dob that originally had a 1.25" focuser. The
specs for the
more recent 12.5" starfinders are: 60" focal length, 2" focuser, 2.60"
secondary. If I
remember right, the center of my secondary is 47" from the center of my primary.
I
replaced the secondary mirror with a 2.48", and I have bought a 2" focuser that
came off
of a 16" starfinder. What I want to know
is: when I bore
a new hole for the focuser (assuming this secondary and focuser can be used with
my
scope without wasting any light) how high up the tube should I place the
secondary mirror
and focuser? If my secondary mirror is smaller than the one that originally
came with the
scope, it seems like it should be a little bit further from the primary than the
original one
was.
