Orion Store
Shopping Cart
0 item(s)
HACKER SAFE certified sites prevent over 99.9% of hacker crime.
Telescopes
Mounts & Tripods
Accessories
Astrophotography
Binoculars
Sale
Gift Center
Community

{"closeOnBackgroundClick":true,"bindings":{"bind0":{"fn":"function(){$.fnProxy(arguments,\'#headerOverlay\',OverlayWidget.show,\'OverlayWidget.show\');}","type":"quicklookselected","element":".ql-thumbnail .Quicklook .trigger"}},"effectOnShowSpeed":"1200","dragByBody":false,"dragByHandle":true,"effectOnHide":"fade","effectOnShow":"fade","cssSelector":"ql-thumbnail","effectOnHideSpeed":"1200","allowOffScreenOverlay":false,"effectOnShowOptions":"{}","effectOnHideOptions":"{}","widgetClass":"OverlayWidget","captureClicks":true,"onScreenPadding":10}

 14 of 22 
Orion Telescopes
Intermediate
Orion 203mm f/4.9 Reflector Telescope Optical Tube Assembly
€ 279.99
 
Accepted Payment
In Stock
  • 203mm (8") aperture and 1000mm focal length f/4.9 reflector telescope optical tube for eye-popping views of deep sky and solar system objects alike
  • Also works well as an astrophotography telescope for shooting wide-field subjects
  • Features a 2" Crayford focuser with a step-down adapter for use of both 2" and 1.25" eyepieces and accessories
  • Reflector optical tube weighs 16.5 lbs.
  • Includes dust caps for telescope front aperture and focuser, camera adapter, collimation cap, dovetail finder scope base, and Starry Night astronomy software download card - tube rings and other accessories sold separately


Learn more
Item #  09788e

Responding to your requests, we are pleased to offer the Orion 203mm F/4.9 Reflector Telescope Optical Tube assembly (OTA) for folks who already have an equatorial mount. This optical tube assembly includes parabolic mirror optics, center marked for easy collimation. It has an upgraded 2" Crayford-style focuser (with 1.25" eyepiece adapter), quick-collimation cap, dust cap, and a dovetail base that accommodates any Orion finder scope. Pre-tapped holes in the rear cell allow attachment of an Orion Cooling Accelerator Fan (sold separately). Aperture: 203mm. Focal length: 1000mm (f/4.9). 2" collimatable Crayford-style focuser. The 203mm F/4.9 Reflector Telescope Optical Tube is recommended for visual use or astrophotography. Includes camera adapter. Weighs 16.5 lbs. Tube rings, tube ring mounting plate, finder scope, and telescope eyepieces sold separately.

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 sales-eu@telescope.com

Product Support
Visit our product support section for instruction manuals and more
  • Best for viewing
    Brighter deep sky
  • Best for imaging
    Deep sky
  • User level
    Intermediate
  • Optical design
    Reflector
  • Optical diameter
    203 mm
  • Focal length
    1000 mm
  • Focal ratio
    f/4,9
  • Optics type
    Parabolic
  • Glass material
    Soda-lime plate
  • Eyepieces
    None
  • Resolving power
    0,57 arc*sec
  • Lowest useful magnification
    29 x
  • Highest useful magnification
    300 x
  • Highest theoretical magnification
    406 x
  • Limiting stellar magnitude
    14,2
  • Optical quality
    Diffraction limited
  • Focuser
    2" Crayford
  • Secondary mirror obstruction
    58 mm
  • Secondary mirror obstruction by diameter
    29 %
  • Secondary mirror obstruction by area
    8 %
  • Mirror coatings/over-coatings
    Aluminum & Silicon Dioxide
  • Mount type
    Optical Tube without Mount
  • Astro-imaging capability
    Lunar, planetary & long exposure
  • Tube material
    Steel
  • Length of optical tube
    96,5 cm
  • Weight, optical tube
    7,5 kg
  • Weight, fully assembled
    7,5 kg
  • Additional included accessories
    Included accessories may vary for 2nds, Substitutions may be made
  • Other features
    2nds are covered by Orion's Satisfaction Guarantee
  • Warranty
    One year

Orders received by 5pm UTC for in-stock items 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.

{"closeOnBackgroundClick":true,"bindings":{"bind1":{"fn":"function(event, startIndex, itemCount, newItems) { QuickLookWidget.assignEvents(newItems); $(\".Quicklook > .trigger\", newItems).bind(\"quicklookselected\", function(event, source, x, y) { OverlayWidget.show(\'#_widget174459439126\', event, source, x, y); }); }","type":"itemsloaded","element":".PagedDataSetFilmstripLoader > .trigger"},"bind0":{"fn":"function(){$.fnProxy(arguments,\'#_widget174459439126\',OverlayWidget.show,\'OverlayWidget.show\');}","type":"quicklookselected","element":".Quicklook > .trigger"}},"effectOnShowSpeed":"","dragByBody":false,"dragByHandle":true,"effectOnHide":"fade","effectOnShow":"fade","cssSelector":"ql-category","effectOnHideSpeed":"1200","allowOffScreenOverlay":false,"effectOnShowOptions":"{}","effectOnHideOptions":"{}","widgetClass":"OverlayWidget","captureClicks":true,"onScreenPadding":10}