Quote:
Originally Posted by strongmanmike
Ok, I'm confused....the problem is not normally the primary mirror holder that moves or "flops", as the scope tracks across the sky but rather the actual primary mirror itself..?
What am I missing here..? 
Mike |
Hi Mike,
not the mirror itself but the mirror cell or mirror holder.
Look at most telescope mirror cells -
or at least the ones I've seen.
They have 3 collimation adjustment screws underneath the mirror cell.
What keeps the mirror cell and mirror in place when you move
the OTA from horizontal to vertical?
The 3 screws don't have tight threads - there will be some movement sideways.
That will affect the collimation when the OTA is at different positions.
cheers
Allan