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This is an Orion Skyline 10" dob in excellent condition, with clean optics and body. The scope movement really is "silky-smooth" as the original ad copy claims, and the focuser works fine as well. This scope is from the same factory as the Apertura AD10 and the Zhumell Z10, and has the same features and accessories.
All of the stock equipment is included; additionally, there is a Telrad (a $50 value) and an Orion Scope Cloak (a $120 value), which is what the scope has been stored in the entire time. We've tested the Telrad and cooling fan, and they're both working as expected.
The scope does have a minor problem - the eyepiece rack has broken off. See the photos. Obviously, this won't affect your views through the scope. We have taken this minor condition issue into consideration in pricing the scope.
Description
Optical quality you can see
- This value-packed 10" Dobsonian telescope boasts top-notch features and comes with a deluxe set of accessories
- Azimuth roller bearings and adjustable altitude trunnions provide silky-smooth telescope motion
- Precision 2" Crayford focuser features dual-speed adjustment control with 10:1 fine-focus
- Includes an 8x50 right-angle finder scope, Orion LaserMate Deluxe II Collimator, cooling fan, and more
Great mechanical performance and sturdy construction
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The Skyline 10" Dobsonian reflector telescope comes "fully loaded" with great features and a deluxe set of performance enhancing accessories. This large-aperture Dobsonian will amaze you with bright, detailed views of celestial objects night after night.
This big Dobsonian reflector features a 10" (250mm) diameter parabolic primary mirror with 94%-96% reflectivity for bright views of celestial treats. The telescope's f/5 optics and long 1250mm focal length will provide night after night of great observing performance, yielding bright views of celestial objects like the Moon and planets, and more distant fare such as cloudy nebulas, star clusters, and galaxies. When you need to align the reflector telescope's optics, adjustments are quick and easy thanks to the tools-free, knurled primary mirror adjustment knobs and center-marked primary mirror. The secondary mirror has a 62.5mm minor-axis and its alignment can be adjusted with a Philips head driver. An included Orion LaserMate Deluxe II collimating tool will help you keep the SkyLine 10" Dobsonian's mirrors in perfect alignment for the best views possible.
Motion of the SkyLine 10" Dobsonian in both altitude (up/down) and azimuth (left/right) is silky smooth thanks to azimuth roller bearings and robust, adjustable ball-bearing altitude trunnions. Tension of both altitude and azimuth motion axes can be adjusted easily, without using tools, for optimized slewing control. If you wish to use especially heavy accessories with the SkyLine 10" Dobsonian, its sliding altitude trunnions let you alter the reflector optical tube's balance point for smooth, drift-free altitude motion. The sturdy Dobsonian base keeps the 10" reflector optical tube steady and secure.
The SkyLine 10" Dobsonian telescope features a machined, 2" Crayford focuser with dual-speed adjustment control and smooth, backlash-free motion. The fine-focus control knob allows you to dial-in details at a 10:1 ratio compared to the coarse focus knobs for ultra-precise focusing. An included adapter allows use of both 2" and 1.25" sized telescope eyepieces, and both the 2" and 1.25" holders feature non-marring compression rings to keep eyepieces in-place without scratching.
Two telescope eyepieces are included: a big 2" Erfle ocular with 30mm focal length, and a 1.25" Plossl eyepiece with 9mm focal length. The 30mm Erfle provides a wide, 41x view in the SkyLine 10" Dobsonian while the more powerful 9mm Plossl eyepiece yields views with 138x magnification. A 35mm-length 2" extension adapter is also included.
The included 8x50 finder scope is a premium right-angle model which displays a correct left/right and up/down oriented image for easy aiming of the 10" Dobsonian telescope. To reduce cool-down time, an included cooling fan can be plugged in (fan battery pack requires 8xAA batteries - not included) to help circulate air in the reflector optical tube for fast performance.
With an assembled weight of 60 lbs., the SkyLine 10" Dobsonian is a big telescope that promises big and bright views. The 48" long telescope optical tube can be separated from the Dobsonian base quickly for easy, two-component transport.
Specs:
- Best for viewing: Fainter deep sky
- Best for imaging: Solar, lunar & planetary
- User level: Intermediate
- Optical design: Reflector
- Optical diameter: 250mm
- Focal length: 1250mm
- Focal ratio: f/5.0
- Optics type: Parabolic
- Eyepieces: Plossl 9.0mm (1.25"),Erfle 30.0mm (2")
- Magnification with included eyepieces: 139x, 42x
- Resolving power: 0.46arc*sec
- Lowest useful magnification: 36x
- Highest useful magnification: 300x
- Optical quality: Diffraction limited
- Finder scope: 8x50
- Focuser: 2" dual-speed Crayford
- Mirror coatings/over-coatings: Aluminum & Silicon Dioxide
- Mount type: Dobsonian
- Bearing material: Needle bearings
- Tube material: Steel
- Length of optical tube: 48.0 in.
- Weight, optical tube: 34.0 lbs.
- Weight, mount/tripod: 29.1 lbs.
- Weight, fully assembled: 63.1 lbs.
Included items
- SkyLine 10" Dobsonian Reflector Optical Tube Assembly (OTA)
- Dobsonian base
- 8x50 Right-angle correct-image finder scope
- 30mm Erfle telescope eyepiece, 2"
- 9mm Plossl telescope eyepiece, 1.25"
- 35mm-length 2" extension adapter
- Orion LaserMate Deluxe II Collimator
- Cooling fan and battery holder
- Handle for Dobsonian base
Specifications
| Aperture | 10" (254mm) |
| Type | Dobsonian |
| Focal Length | 1250mm |
| Focal Ratio | 5 |
| Magnification (with included eyepieces) | 42x (30mm), 139x (9mm) |
| Limiting Magnitude | 14.5 |
| Lowest Useful Magnification | 36x |
| Highest Theoretical Magnification | 500x |
| Light Grasp Compared to Smaller Model | 57% |
| Optical Tube Weight | 35 lbs |
| Base Weight | 31 lbs |
| Assembled Weight | 66 lbs |
Orion Scope Cloak for Large Dobsonian Telescopes
The Orion Scope Cloak will help protect your telescope when it's idle, shielding it from the elements - dirt, moisture, and sunlight. In the daytime, it will keep your telescope cooler so it will reach thermal equilibrium faster once night falls! Between viewing sessions, a Scope Cloak will keep your instrument clean and dry. This cloak measures 68" long, with a 48" wide opening tapering down to 31" at the top of the cloak.
Each Scope Cloak Telescope Cover is made from reflective, tear-resistant fabric with a waterproof lining. A locking drawstring provides a snug fit, and a convenient nylon carrying pouch is included. Scope Cloaks are not intended for permanent outdoor storage.