Summary

https://docs.google.com/drawings/d/1acsk9F1QBJbt7kRx0QtndBbLgJbyuFQaTv8i0cAUHK0/edit?usp=sharing - Paper Insert for collimator

Designed for collimating my 8" RC but should work some Newtonians as well. Fits in 2" focuser and holds this super common flashlight from amazon. Search red flashlight and you'll find it from lots of sellers.

1) Adjust the secondary mirror screws so that the dot from the collimator is central in the ring marked on the secondary mirror.

2) Adjust the primary mirror until the larger red ring is of even thickness.