Quote:
|
Originally Posted by janoskiss
Until you crank the mag ...
My sighttube collimated f6 8" just starts failing the star test at around 400x, on the rare occasions that conditions allow star testing at such high magnifications. It is very fiddly to get it any better, if not impossible, without tracking. But if you're not imaging there is little point.
|
Yep Steve that the thing. You cant use the star test to align unless you're sure that the star diffraction pattern is exactly in the centre of the fov.
How do you do that and keep it there at +400x without tracking?
What really helps is if your centre donut size is well matched to the size of the illuminated ring from the cheshire. Another option for ultra fine collimation is a barlowed laser setup.