On Wed, 12 Jan 2005 18:28:39 -0000, Nick Clark wrote: > Strangely the moon is even larger when using the shorter focal > length 4mm eyepiece, which I haven't quite worked out yet.
If I understand it correctly, the magnification of the image you see will be the focal length of the scope divided by the focal length of the eyepiece. So, with the 20mm eyepiece you'd get 45X magnification, but with the 4mm eyepiece you'd get 225X magnification. TTYL, DougF KG4LMZ
