Quote:
Originally Posted by rodroger
ts that the smaller the dot the more accurate the collimation? such as the tip of a fine felt pen? (as long as you can see the dot!)
An another query is if the dot is too big would it not cause abberrations or a mark in the image quality?  |
If you are using a cheshire collimator the best size centre is one that matches the inner diameter of the illuminated ring, or just slightly smaller. That way small errors can be easily seen.
The "dot" lies in the shadow of the secondary mirror, so it wont affect the image quality at all other than how it improves your collimation
