"Robert J. Chassell" wrote:
...
> Do not buy anything with less than a 6 inch (150 mm) aperture (diamter
> of the lens or, more likely, main mirror). Smaller telescopes don't
> gather enough light, so they are only good with bright objects like
> the moon and planets, and even then, they are not so good since you
> cannot increase effective magnification much.
Well, you can look at star clusters with a small scope
too. And there are some nebulae where you see something.
Agreed, aperture is what matters. And an equatorial
mount is good if you're using high magnifications, and nice
if you want to be able to find something again after leaving
the telescope for five minutes.
---David
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