Re: (IAAC) FWD: What should I buy? (rich field scopes)
>>>However, how many of them would you
>>>consider to be "showcase" objects?
>>Dave, there are a lot more than the few objects you mentioned. You could not
>>appreciate or fit most of the open clusters that *I* love into high mags....
>Have you ever seen any of the objects that you mentioned through a large
>telescope equipped with a 2" wide-field eyepiece? You'd be surprised at
>just what will fit into the field of view. (Certainly the Helix will since
>it is only about 30" in size.) And believe me when I say that I have seen
Ahh, make that 30' (41' from one source) for the angular size of the Helix.
And did I mention 80mm Orion ShortTubes and their Celestron counterparts, 80mm
Celestron First Scopes, 90mm Orion refractors, 3.5" Questar Maks, Celestron
C102's, 4" Takahashis, 4.25" Astroscans, 6" Trischiefspieglers, 6" Quantum
Maks, the Astro-Physics Maksutov-Newtonian, Schmidt-Cassegrains from 4" to 16",
16" Ritchey-Cretien Cassegrains, and many others that I can't recall at the
Forgive me for dropping some names here but I'm trying to make a point. If
you're only familiar with the dim, high power views of deep-sky objects in a
relatively small telescope you can't appreciate what increased aperture does in
allowing one to boost magnification and still have a relatively bright image.
(Of course, 2" wide-angle oculars come into play here.) To use your own
example, M11 looks just great, thank you, through the ASH 17" f/15 classical
Cassegrain at 202x. (Have you ever noticed the five-pointed "star" formed by
the stars and "voids" of this cluster's center?) My best views of M17 and M33
were through the massive 32" equatorial mount reflector at the 1994 Stellafane
convention. Another case in point is M13's "Propeller", or Mercedes Benz
symbol, which is best seen at higher magnifications. Also, one can easily see
the HII regions in M33 and many of the globular clusters in M31 with a large
instrument and the appropriate magnification.
Now, when you're talking the North American Nebula or the entire Veil Nebula
that's another story entirely. :-)