On Aug 25, 2009, at 17:07 , Larry Colen wrote:
On Tue, Aug 25, 2009 at 06:47:08PM -0400, Igor Roshchin wrote:
For those of you who likes watching the sky using optics:
Google featured (doodled) today 400 years of Galileo's telescope:
That brings up something I've been wondering about.
How long and fast of a lens would I need on my K20 to get a shot
showing Jupiter's disk and moons?
Would my bigma do it?
Sure. But you would not be able to see anything except a spot. With
my 2000mm Celestron and a good medium power eyepiece (45mm Plossel),
Jupiter is about the size of a pinkie nail, the moons just dots.
Smaller than Saturn in appearance.
This is from memory. I haven't set the Celestron up in 2 years.
Joseph McAllister
[email protected]
http://gallery.me.com/jomac
http://web.me.com/jomac/show.me/Blog/Blog.html
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