Quote:
Originally Posted by paulF
Hey guys,
the plan was to keep the same setup(main/secondary mirrors ) and only change the OTA to be longer. Again, this is just to experiment, nothing serious. I just want to see how much i can push the longer focal length  |
Your mirror is ground & polished to a focal length. To do a 4" 2000mm FL scope would require a new mirror, tube and secondary, in other words make a whole new scope.