Telescope lenses and magnification?
Thursday, April 15th, 2010 at
3:18 am
I have a 130mm Orion telescope with a 10mm and a 25mm lens. I also have a double magnification lens. The telescope is supposed to see to at least the rings of Saturn. At best I've gotten the moon and some craters. Yay.
Are these lenses good enough to see Saturn, or even Mars, and if not what lenses do I need to do so?
Diameter 130mm. F.L 900mm f/7
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US $125.02
You need to specify the focal length to find the magnification= focal length of objective/focal length of eyepiece.
The 10mm should work fine for Saturn’s rings. A 6mm would be better, if the viewing conditions are right.
your max magnification is 900/10=90x that is way more than enough for saturn, you won’t be thrilled with mars though.