Checking Telescope Diagonal Offset

[Johnmore]

Can anyone tell me how you can check if the offset of the diagonal mirror is the correct amount in the direction away from the focuser, as I cannot see how this can be identified whilst collomating the scope.

thnx

[rocket]

Go to this website [Registered users can see links. ], there you will find some excellent tutorials on collimation. I was able to adjust my cheap Chinese Scope so it would allow me to view the Rings of Saturn with good clarity.
Just be patient and take your time when adjusting and a lot of it is just trial and error, if you don't have one I recommend a laser collimator with the built in target but Olaf Carlin will tell you how to make your own collimating tools at not too much expense if you are handy with basic tools. Check it out.