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ABQJeff

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About ABQJeff

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    Astronomy, Skiing, Scotch and College Football
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    New Mexico

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  1. Also another key consideration: Newts (of which a Dob is a type) can’t do terrestrial viewing. So if you want to look at mountains, lakes, oceans, birds, etc. have to get a refractor, Mak-Cass or SCT (latter two would be a bit of overkill, but can do it).
  2. It would help to know price range, portability requirements, if you are good with learning collimation, want zero maintenance, if you want to learn the sky via star hopping, push to or go-to. Of course ask if you are not sure on any of these. Without knowing the above, I say 4” AT102EDL on StarSeeker IV mount or a 8-10” Dob on push or go to. First is more portable/less maintenance, latter has more aperture/more logistics.
  3. Contrast effects (important for planets) largely goes as the linear diameter of central obstruction. So a 127mm Mak with a 33% obstruction by linear dimension (ie 42 mm) will give contrast of an 85mm ED/APO refractor. When most people say XX refractor vs YY Mak or SCT on planets, they are generally comparing contrast performance. Brightness effects (important for DSOs, and in a Mak we are talking planetary nebulas and globular clusters, not widefield DSOs like Veil or North American nebulas) depends on area of obstruction. The same 33% obstruction in a 127mm Mak by linear diameter will
  4. Got into astronomy this fall (with all the lock downs), joined Cloudy Nights earlier this year, now joining this forum. I am a new binocular (Oberwerk 12x60), Cass (Orion Mak150) and Frac (Orion ED80) user (for size and portability to get to dark skies). Been checking out dark sky sites in the area, but home is not too bad (Bortle 4-6 depending on what direction I look). From home, even in suburban LP, I can see all the Messier Open Clusters, brighter PNs (eg M57, Ghost of Jupiter, Saturn, NGC 1535) and GCs (M2, M13, M15, M92, etc.), M31, even some fainter stuff like M1 and Sculptor Galax
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