Out of the following lenses:
• 20mm -- 45x
• 12.5mm -- 72x
• 4mm -- 225x
And a 3x Barlow Lens.
(Telescope: DIA. = 76mm, F = 900mm)
Which combination would you recommend for the following:
On a 'typical' night...
I've found that the following have been pretty good for the brighter stars of the night sky:
3x Barlow + 20mm [45x] = 135x
I've yet to have a clear night where I can see anything other than sirius, and a few stars from orion however. :-(
But when I get the opportunity to gaze at the moon, mars, and saturn, I'd like to know which lenses I should try first... because obviously, I could be perfectly lined up on something, but not see it, because my mag is all wrong.
So, any guesses? Around about 135x?
(Also, while we're at it: any other star-gazing tips? Unfortunately, my telescope has an absolutely rubbish Alt-Azimuth Mount, so it's a little frustrating...)