dobsonian telescope 16
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Orion Three-Fan Cooling System for Convex-Back Dobsonians
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DescriptionThis time-saving cooling system features three fans which have been custom designed to fit the Orion XX14g GoTo Dobsonian primary mirror cell. All three small fans work in tandem to help reduce the amount of time needed for the telescope to reach thermal equilibrium with the ambient air temperature of your observing location. You'll enjoy peak performance from your XX14g GoTo Dobsonian without having to wait as long for the air inside the telescope to cool down to the same temperature as your stargazing site. Consisting of three 12-volt DC, 0.12A fans which are wired in parallel, the Orion Three-Fan Cooling System for Convex-Back Dobsonians features a single 35" long power cable splitter for convenient use. Each fan boasts 33.4 CFM (cubic foot per minute) air flow to help significantly accelerate cooling of your Dobsonian telescope's optics. The fans operate quietly without vibrating, and they mount easily in threaded holes on the the XX14g primary mirror cell with included hardware. For best results, run the Orion Three-Fan Cooling System prior to using the reflector telescope. You can also use the cooling fans intermittently between observations to compensate for any ambient temperature changes that may occur. Power is supplied using the included battery holder which accepts 8 D-cell batteries (batteries not included). Since the Three-Fan Cooling System current draw is a low 0.36 amps, a full battery holder with 8 D-cells will provide over 24 hours of use. Features
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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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Orion Three-Fan Cooling System for Convex-Back Dobsonians
List Price: |
DescriptionThis time-saving cooling system features three fans which have been custom designed to fit the Orion XX14g GoTo Dobsonian primary mirror cell. All three small fans work in tandem to help reduce the amount of time needed for the telescope to reach thermal equilibrium with the ambient air temperature of your observing location. You'll enjoy peak performance from your XX14g GoTo Dobsonian without having to wait as long for the air inside the telescope to cool down to the same temperature as your stargazing site. Consisting of three 12-volt DC, 0.12A fans which are wired in parallel, the Orion Three-Fan Cooling System for Convex-Back Dobsonians features a single 35" long power cable splitter for convenient use. Each fan boasts 33.4 CFM (cubic foot per minute) air flow to help significantly accelerate cooling of your Dobsonian telescope's optics. The fans operate quietly without vibrating, and they mount easily in threaded holes on the the XX14g primary mirror cell with included hardware. For best results, run the Orion Three-Fan Cooling System prior to using the reflector telescope. You can also use the cooling fans intermittently between observations to compensate for any ambient temperature changes that may occur. Power is supplied using the included battery holder which accepts 8 D-cell batteries (batteries not included). Since the Three-Fan Cooling System current draw is a low 0.36 amps, a full battery holder with 8 D-cells will provide over 24 hours of use. Features
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Orion Scope Cloak - 12"-16" Dobsonians
List Price: |
DescriptionThe Orion Scope Cloak Telescope Cover is an affordable and easy to use telescope cover that protects your equipment from dust, dirt, dew, and sunlight. Large aperture Dobsonian reflector telescopes of 12" to 16" aperture can easily be kept clean and tidy with this Scope Cloak. Keep your telescope set-up and ready for viewing in your garage, shed, or home observatory without worrying about dust and dirt contamination. Orion's Scope Cloak is made of a high-tech tear-resistant and water-resistant material that keeps your optics free of dew. The highly reflective exterior surface rejects solar radiation, keeping your telescope cool when left in sunlight and reduces cool-down time (the amount of time required for your telescope to reach thermal equilibrium after nightfall). The Scope Cloak Telescope Cover prevents dust form contaminating telescope optical surfaces, reducing the need to perform delicate and tedious cleaning procedures. A handy locking drawstring provides a snug fit once installed on your telescope. The Orion Scope Cloak Telescope Cover for 12"-16" Dobsonian Reflector Telescopes is designed for temporary outdoor use and is not intended to be used for permanent unsheltered outdoor storage. A handy nylon carrying pouch is included. Features
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14.21" ID Orion Off Axis Solar Filter
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DescriptionDesigned to fit snugly over the aperture of your telescope, these optical glass filters block 99.999% of incoming sunlight, allowing you to safely observe sunspots and solar granulation in the Sun's photosphere. The Sun appears in a natural, whitish color. The glass elements are machine-polished and triple-coated with nickel-chromium stainless steel for a scratch-resistant surface. Each filter has three nylon thumbscrews to ensure a snug fit to the front of your telescope or binocular. The thumbscrews complement the press-fit foam lining inside the filter's durable aluminum cell to accommodate diameters up to ¼" smaller than the nominal size. A tight press fit is still required for safe solar viewing. Lifetime limited warranty. Features
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Meade 16 Inch Lightbridge F4.5 Truss-Tube Dobsonian Telescope
Sale Price: $1,849.00 |
DescriptionMeade 16 Inch Lightbridge F4.5 Truss-Tube Dobsonian Telescope. |
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Zhumell 16 Inch Truss-Dobsonian Telescope - Zhumell ZHUE026-1
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DescriptionZhumell ZHUE026-1 Telescopes - Astronomy -- Never before has a telescope been so designed with you in mind. Zhumell's latest 16 Inch Truss-Dobsonian Telescope ZHUE026-1 is the result of a new approach to design. Zhumell's 16-inch Z-Series Telescope combines the best of impressive power and light-gathering capacity with remarkable portability - because this telescope assembles and disassembles quickly,you can transport it to your favorite observation point with relative ease. Despite its formidable size,this telescope is surprisingly portable thanks to its lightweight aluminum trusses. Zhumell 16 Inch Truss-Dobsonian Telescope can be set up and taken down quickly,making it a valuable asset for fully enjoying your favorite dark-sky location. This amazing Zhumell Telescope features an 16-inch aperture as well as diffraction-limited,fully coated optics and top-quality components at a price comparable to standard Dobsonian telescopes. These fully coated Zhumell optics will provide crisp,co |
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Meade LightBridge Deluxe 16-Inch Truss Tube Dobsonian Telescope - MEAD385-1
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DescriptionIt's not just a big telescope. It's a big telescope that goes anywhere. The new LightBridge Truss-Tube Dobsonian Telescope from Meade disassembles and sets up quickly so you can take one of these massive windows to the universe out to your favorite dark-sky location with ease. The LightBridge Dobsonian gives you high-quality Meade optics premium components and ultra portability - all for about the same price as an ordinary tube Dobsonian. Get a LightBridge Truss-Tube Dobsonian today and prepare to cross the universe.Diffraction Limited OpticsMeade optics consistently outperform telescopes of similar and larger aperture. Consumers know that "Meade Optics Inside" means that what they see through our telescopes will be views that are detailed crisp and full of contrast.Meade Optical CoatingsAluminum coatings with magnesium fluoride provide bright images full of detail.2-inch Crayford-Style Machined Aluminum Focuser with 1.25-inch AdapterSmooth precise focusing is achieved with this classic design. A unique focus-tension knob and focus-lock design give complete control over focus.Built-In Primary Mirror Cooling FanBring the telescope into thermal equilibrium quickly and efficiently with the battery-powered cooling fan. The fan is mounted to the rear of the "vented" primary mirror cell for fast cool-down.Steel RA Roller BearingsRoller bearings make movements smooth and effortless.Advanced Four-Reticle Red-Dot Viewfinder Finderscope Four reticles and varying brightness controls allow this deluxe finder to adjust to your observing needs.Series 4000 26mm EyepieceThis is a premium four-element 1.25-inch eyepiece with a stunning 52-degree apparent field of view.Series 4000 26mm QX Wide Angle EyepieceThis premium eyepiece has a 2-inch optical design and boasts a whopping 70-degree apparent field of view.Easy to Assemble and Quick to Set UpMetal Front Secondary Mirror Tube with 2-inch Crayford FocuserA Crayford-style focuser is a premium focuser that allows fast accurate |
