dobsonian telescope 16
eyepiece collection?
please rate my eyepiece collection:
telescope=Celestron Starhopper 8 inch dobsonian f/6
*numbers represent focal length in millimeters
Huygen-12.5, 6,
Kellner-10, 15, 25,
Housebrand Plossl-6.5, 10, 12.5, 15, 20, 25, 30, 40
Housebrand Ultra Wide Angle-11, 16
Super Plossl Series 4000-9.7, 26
Celestron Plossl-25
Orion Expanse-6, 9, 15,
Barlow 2x-Orion Shorty, Housebrand Barlow 2x aluminum
Will use my Huygenian Eyepieces for solar viewing,
Plossls and UW Eyepieces for astronomical viewing, Orion Expanses for planetary viewing, and Kellner for back up lenses (show and tell at star parties).
which eyepiece(s) do I not need? quality in; for example, i've got a SP 26mm, Housebrand Plossl 25, and Celestron Plossl 25. Obviously, I've got two extra.
Thanks. Hoping to sell unnecessary eyepieces
Best suggestions get best answer
Eyepiece preference is a personal thing, so you'll have to decide which ones are keepers. I think six eyepieces plus a barlow constitute an adequate collection - something like 6, 9, 12, 16, 25, 30. The 40 mm Plossl (assuming it's a 1.25") has a narrow apparent field and shows about as much sky as the 30 mm, so it can probably go. If you haven't already formed an opinion, compare the performance of your 25-26 mm Plossls and keep the best one. Consider whether you need both 20 and 25 mm focal lengths; you may find you have three superfluous eyepieces. Choose one from the 9.7-10 mm, too. Depending on how good the Plossls are, you might want to get rid of the 6.5, 9.7, 10, and 15 and use the Expanse eyepieces exclusively.
Huygens for solar viewing? Are you doing solar projection? Not a good idea with a reflector, as it can focus the sunlight on the inside of the tube and burn it. And if your secondary is glued on, the heat can weaken the bond and make it fall on your primary. Better to get some Astro-Solar film and make a solar filter.
As I see it, you could sell maybe eight of your Plossls. Decide which focal length you get the most use out of, and put the money towards a premium eyepiece in that focal length. Buy used on Astromart ( http://www.astromart.com/ )for the best deals.
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