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Anonymous
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Im wondering. Im kinda not happy im stuck with .93 deg fov with my etx-125. Until other options are more clear that is. Question is, take all the DSO that are that are visible in a 5" scope, now take all the of thost that are bigger than 1 deg. How many are there? How many DSO will not be able to to see completely, not because of magnitude, but because of size? I realize this question is sorta loaded, I havent been able to find a reference online though, thanks all!
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matt
Vendor (Scopemania)
Reged: 07/28/03
Posts: 10022
Loc: Chaville, France
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- M31. But I keep on saying that nothing beat viewing it under a dark sky with the naked eye
- The pleiades, the Double cluster
- The north America Nebula / Pelican Nebula, though a 5" MCT certainly is not designed with viewing that object in mind
- M42 is somewhat larger, but the main stuff fits in .6°. I ersonnally believe that the outer, dimmer stuff is better seen with the bright core outside the fov.
- M8, the Lagoon Nebula
- the Large and Small Magelanic clouds!
These are those I can think about.
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Matt
CI700 mount with various scopes on top.
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Ron B[ee]
Tyro
Reged: 04/27/03
Posts: 4719
Loc: CA
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Quote:
Im wondering. Im kinda not happy im stuck with .93 deg fov with my etx-125. Until other options are more clear that is. Question is, take all the DSO that are that are visible in a 5" scope, now take all the of thost that are bigger than 1 deg. How many are there? How many DSO will not be able to to see completely, not because of magnitude, but because of size? I realize this question is sorta loaded, I havent been able to find a reference online though, thanks all!
An excellent question, Matt! Well, I don't have an exhaustive list. Here's a few in addition to those you already have:
M24, M33, M44, NGC 1499, NGC 2237, NGC 2264, NGC 6281, NGC 6960 (Veil complex), NGC 7822, IC 1318, IC 1396, IC 1805, IC 1848, IC 2118, IC 2177, B44, B142, B168, Cr 399, Mel 111, Sculptor Dwarf Galaxy, Kemble Cascade and the Double Clusters together.
I'm sure there are more. Also, many of the nebula don't seem to have size listed in the catalog  .
Ron B[ee]
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5-inch Tele Vue NP127 APO 
4-inch Tele Vue TV-102 APO 
8-inch f/6 Discovery PDHQ Dob 
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matt
Vendor (Scopemania)
Reged: 07/28/03
Posts: 10022
Loc: Chaville, France
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What is Kemble's cascade? What is CR399?
And do you think a 5" scope owner (probably living in the Northern hemisphere, so as unlikey to see it as to see the LMC and SMC) has to worry about not having thesculptor Dwarf in one field?
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Matt
CI700 mount with various scopes on top.
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Anonymous
Unregistered
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yes, im in arizona, USA. So which of those mentioned apply to me?
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matt
Vendor (Scopemania)
Reged: 07/28/03
Posts: 10022
Loc: Chaville, France
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Of those I mentioned, only the Magellanic Clouds are too far south to be seen. In Az you might be down south enough to see Sculptor though. All others are northern objects. But my point is that there are not that many objects that don't fit in a .9° fov, and those that do are best seen with binocs (pleiades, Andromeda) or at high power (Orion Nebula)
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Matt
CI700 mount with various scopes on top.
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