|
I used to have an 8" f/6, so also 1200mm focal length, and found that a 6mm Radian was excellent for planetary at 200x. Later I swapped it for a 5mm Radian to get more power but found the atmosphere wouldn't support 240x on a lot of nights.
Better to get a good eyepiece you can use all the time. Of course, Radians are now discontinued but you can get them used for a good price.
|