[N1 (Mirko)]

Originally Posted by casstony

Lots of interesting RC info including collimation guide here: http://interferometer-tests.blogspot...etien-gso.html

Interesting page, particularly this bit:

"As only about 50% of the light is concentrated in the Airy Disk, and the rest in the diffraction rings, the resolution effectively is just half the value the aperture size suggests. A 10" RC has the effective resolution of a 5" instrument without obstruction"

So my FC76 should resolve similar detail to what my RC6 can do. Sounds fantastic if unlikely. Must do a test sometime.