Quote:
Originally Posted by Task Force
Nice telescope... so what is its magnification?
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Heh... the number one misconception about telescopes.
It all depends on which eye piece you put in. Eyepieces are as varied as the day is long my 'highest magnification' eyepiece is a 7.5mm vixen lanthium which gives and effective magnification of around 162x. At that magnification it is no small feat to keep the object centered in the eyepiece as it will corss the entire field of view in less than 10 seconds. Not to mention getting it centered in that narrow view to begin with.
My favorite eyepiece is the 28mm plossel (university optics). It has a nice field of view passes alot of light and has very little edge distortion thats around 37x and the object stays in the eyepiece for at least 20 seconds. Easier to chase.
It is an f8 at 6" which makes its focal lenght around 48" at that point the incoming start light is focused. Its up to the eyepiece to magnify that focused image.
Its easier to use the calculator web applet instead of going through alot of math...
http://www.csgnetwork.com/telescopemagcalc.html#
By the way it is easy to see jupitor and her moons through the 28mm with the 7.5 you can see the moons shadows on the planet
Not to mention the red spot.