120 mm f8.3 Collimation
Posted 20 October 2003 - 04:47 PM
Posted 21 October 2003 - 07:16 AM
How's it look at night?
Posted 21 October 2003 - 11:03 AM
Posted 21 October 2003 - 11:40 AM
Posted 21 October 2003 - 02:47 PM
Just out of curiosity (sorry to barge in on your post Bob), but how will the optics differ in a properly collimated scope to one that isn't?
Posted 21 October 2003 - 03:18 PM
If its the focuser out of alignment then everything outside of the center of view will be comas, serious violet chromatic abberations, and you cant focus perfectly, I had one I just fixed that exp. this. Never had a mainlens out just pinched optics so someone else will have to kick in. I would imagine its close to being similar tho to the focuser being out other than pinched optics I imagine. Dave
Posted 21 October 2003 - 04:27 PM
Posted 21 October 2003 - 09:24 PM
What you want to see is "concentric donuts".
I have a 70 mm. refractor which I tested for collimation with a cheshire eyepiece; fortunately it was O.K., because this scope's objective has no means of adjustment.
Posted 22 October 2003 - 07:30 AM
Posted 22 October 2003 - 02:56 PM