Now I dont want to lower the high tech tone of this almost ended thread but would like to resurrect it for a mo with a very basic question.
The shift of the central shaded spot on a defocussed star is very marked with my scope and I suspect that the 1st stage of collimation would be a worthwhile exercise for me to carry out. My FL is 1325mm so with my 25mm ep this equates to only 53X and this gives small but clear..er images than my 10mm ep (132X). The scope is a small (102mm dia) Mak (Celestron Nexstar 4 GT) but I dont see any collimation screws as discussed here. I desperately need to sort this out as I have a new ep on the way which will give me maximum mag for this scope (6mm) and I am concerned that the quality of image will nly get worse at the higher magnification.
I am wondering if collimation is posible for this type of scope. No mention made in the manual. Any clues guys???