I think I now understand what I need to do as far as collimation goes. Very soon I'll get the right tools and jump into this.
Quote:
|
Where abouts do you live, and do you have a rough idea of what the drops from and down to?? ie is it 16 degrees at 9pm when you take your scope out and then at 12am it is 2 degrees???
|
I live in metro Adelaide. On the weekends I use my telescope about 120km away under darker skies. I really havn't watched the weather that much because I underestimated its importance. Two mins and maxs that I've noticed lately were 10 and 25, 13 and 24. I'm not sure when the mins occured but Ive normally packed up my telescope around 11 pm to 12 midnight which is probably too early as far as seeing is concerned. I'll have to start keeping an eye on the temp.
Quote:
|
also when you barlow your 9mm your exit pupil is about 1.1 which is too small. really for crisp images your exit pupil shold be considerably higher. the 9mm by its self gives you an exit pupil of about 2.2 which is quite good in good seeing.
|
I think I understand what exit pupil means, but I didn't know it had this consequence. How can I get around this? I guess I buy a short focal length eyepiece with appropriate exit pupil. I don't think I will be addressing this until I have these other issues sorted.