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 5 of 51 
Orion Telescopes

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Intermediate
Orion 10" f/3.9 Newtonian Astrograph Reflector Telescope
$669.99
3 easy payments of $223.33
With payment plan
 
Accepted Payment
Expected Ship Date: 12/23/2014

  • This affordable 10" astrograph is ideal for capturing stunning deep-sky astrophotos
  • Fast f/3.9 focal ratio provides swift wide-field imaging performance
  • Enhanced reflectivity aluminum coatings on primary and secondary mirror provide 94% reflectivity
  • Sturdy 2" dual-speed low-profile Crayford focuser permits ultra-fine focus with 11:1 ratio
  • Extended tube length of 7.5" in front of the focuser blocks peripheral light, optimizing image contrast


Learn more
Item #  08296

Our largest reflector optimized for astrophotography boasts 10" parabolic primary optics with a very fast f/3.9 focal ratio for exceptional wide-field, deep-space imaging performance. Even faint galaxies and nebulas exhibit stunning detail with limited exposure time when photographed through this large-aperture astrograph with a CCD imager or DSLR camera. You’ll get incredibly bright, crisp images that will make apo refractor aficionados green with envy - and you’ll have more green in your wallet thanks to this telescope’s more-affordable Newtonian design.

Both the 10" (254mm) primary and secondary mirror feature enhanced reflectivity (94%) aluminization for bright, contrast-rich images. The 82mm minor axis secondary mirror provides excellent full-field illumination with modern CCD imagers and DSLR cameras, with less than 8% light drop-off at the edge of APS-C sized sensors. The adjustable 4-vane secondary mirror holder features very thin, 1mm thick spider vanes to minimize diffraction effects in images. A center mark on the primary mirror and three easy-grip collimation knobs make optical alignment easy and precise.

Extended tube length of 7.5" in front of the focuser blocks intrusion of off-axis light, ensuring optimum image contrast. The sturdy 2" dual-speed (11:1), low-profile Crayford focuser permits ultra-fine focus and has 38mm of drawtube travel and a helpful drawtube lock knob. A steel reinforcing plate bolted inside the 38.6" long tube directly under the focuser helps eliminate flexure between it and tube, even with heavy imaging gear attached.

As with any fast Newtonian, an optional coma corrector is recommended to achieve flat-field imaging performance. Standard accessories include two cast aluminum tube rings, a 9x50 finder scope, 2" and 1.25" extension adapters, and a 12V DC fan for accelerated primary mirror cool-down (fan requires 12V power supply or 8 AA batteries, not included).

Not only does this affordable astrograph excel as an astrophotography instrument, but the 10" f/3.9 Newtonian can also be used as a formidable visual telescope. Its large 10" aperture and fast focal ratio will provide wondrous views of deep space objects, the planets and Moon, and sparkling star fields in both 2" and 1.25" telescope eyepieces.

Get the Orion 10" f/3.9 Newtonian Astrograph reflector telescope today and take your shot!

Warranty

Limited Warranty against defects in materials or workmanship for one year from date of purchase. This warranty is for the benefit of the original retail purchaser only. For complete warranty details contact us at 800-676-1343.

Product Support
Visit our product support section for instruction manuals and more
  • User level
    Intermediate
  • Optical design
    Reflector
  • Optical diameter
    254mm
  • Focal length
    1000mm
  • Focal ratio
    f/3.9
  • Optics type
    Parabolic
  • Glass material
    Low thermal expansion glass
  • Resolving power
    0.46arc*sec
  • Lowest useful magnification
    25x
  • Highest useful magnification
    300x
  • Highest theoretical magnification
    500x
  • Limiting stellar magnitude
    14.7
  • Optical quality
    Diffraction limited
  • Finder scope
    9x50
  • Focuser
    2" dual-speed Crayford
  • Secondary mirror obstruction
    82mm
  • Secondary mirror obstruction by diameter
    32%
  • Secondary mirror obstruction by area
    10%
  • Mirror coatings/over-coatings
    Enhanced Aluminum & Silicon Dioxide
  • Mount type
    Optical Tube without Mount
  • Astro-imaging capability
    Lunar, planetary & long exposure
  • Tube material
    Steel
  • Length of optical tube
    38.6 in.
  • Weight, optical tube
    25.5 lbs.
  • Additional included accessories
    Tube rings, Cooling accelerator fan, 2" to 1.25" adapter
  • Other features
    Primary mirror center mark, Extended tube in front of focuser, Quick collimation cap
  • Warranty
    One year

Orion 10" f/3.9 Newtonian Astrograph OTA
9x50 Finder scope and bracket
12V DC Cooling accelerator fan
2 Die-cast hinged tube rings
2" -to-1.25" Eyepiece adapter
Collimation cap
Dust caps
Starry Night Special Edition astronomy software

Orders received by 1pm Eastern Time for in-stock items ship the same business day. Orders received after 1pm will ship the next business day. When an item is not in-stock we will ship it as soon as it becomes available. Typically in-stock items will ship first and backordered items will follow as soon as they are available. You have the option in check out to request that your order ship complete, if you'd prefer.

A per-item shipping charge (in addition to the standard shipping and handling charge) applies to this product due to its size and weight. This charge varies based on the shipping method.

Standard Delivery: $0.00
3 Day Delivery: $161.00
2 Day Delivery: $161.00
Next Day Delivery: $211.00

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