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 144 of 151 
Orion Telescopes
Orion 8" f/4 Newtonian Reflector Astrograph
$699.99
3 easy payments of $233.33
With payment plan
 
Accepted Payment
Expected Ship Date: 11/15/2021

  • Affordable 8"-class Newtonian telescope optimized for wide-field astrophotography
  • The 200mm (7.9") aperture f/4 parabolic primary mirror is made from high-quality BK7 glass with enhanced aluminum coatings to provide >92% reflectivity for bright, vivid images
  • Its short focal length and big aperture let you capture more light from deep-sky objects in less time, greatly improving your imaging efficiency
  • Compact and lightweight at just 28" long and 16 lbs., can be supported on a mid-sized mount such as the Orion Atlas II EQ-G
  • Includes 8x50 finder scope, hinged tube rings, 12V DC cooling accelerator fan, and a quick-collimation cap. A coma corrector (sold separately) is recommended for optimal flat-field performance.


Learn more
Item #  09505b

In keeping with our philosophy of offering great astrophotographic gear at affordable prices, check out our 8" f/4.0 Newtonian Reflector Astrograph. For wide field, deep-space imaging performance, this telescope has few rivals. Its big 8" aperture and fast f/4.0 focal ratio allow the capture of faint galaxies and nebulas with short photographic exposure times - and for a fraction of the price that a premium "apo" refractor even half its size would cost.

The Orion 8" f/4.0 Newtonian Reflector Astrograph is perfect for intermediate-level astrophotographers, and a great second telescope for more advanced imagers who want more portability, without sacrificing quality. It excels for capturing bright, detailed images with CCD or DSLR cameras. As with any fast Newtonian reflector, an optional coma corrector is recommended to achieve the sharpest images. With an optional eyepiece, this telescope doubles as a fine visual instrument for studying deep-space wonders.

Weighing only 16 lbs. and just 28" long, this instrument is easily supported on a mid-sized equatorial mount, like our Atlas II EQ-G. The 200mm-aperture parabolic primary mirror is made from low-thermal-expansion BK7 optical glass. Enhanced aluminum mirror coatings with 92% to 95% reflectivity deliver more light to the focuser. A cooling accelerator fan is included on the primary mirror cell for rapid temperature equilibration, to ensure stable images.

We outfitted this telescope with a machined 2" dual-speed (10:1) Crayford focuser that incorporates a linear-track bearing. This advanced focuser design provides superior camera support and eliminates drawtube flexure. Backfocus distance is 83.2mm from the 2" collar. Standard accessories include a pair of hinged tube rings, 8x50 finder scope, 2" extension adapter for visual use, and a quick-collimation cap.

Great telescopes for astrophotography don't have to cost thousands! Get the Orion 8" f/4.0 Newtonian Reflector Astrograph today.

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 800-447-1001.

Product Support
Visit our product support section for instruction manuals and more
  • Best for viewing
    Fainter deep sky
  • Best for imaging
    Deep sky
  • User level
    Advanced
  • Optical design
    Reflector
  • Optical diameter
    200mm
  • Focal length
    800mm
  • Focal ratio
    f/4.0
  • Optics type
    Parabolic
  • Glass material
    BK-7
  • Eyepieces
    None
  • Resolving power
    0.58arc*sec
  • Lowest useful magnification
    29x
  • Highest useful magnification
    300x
  • Highest theoretical magnification
    400x
  • Limiting stellar magnitude
    14.2
  • Finder scope
    8x50
  • Focuser
    2" dual-speed linear bearing Crayford
  • Secondary mirror obstruction
    70mm
  • Secondary mirror obstruction by diameter
    35%
  • Secondary mirror obstruction by area
    12%
  • Mirror coatings/over-coatings
    Aluminum & Silicon Dioxide
  • Mount type
    Optical Tube without Mount
  • Astro-imaging capability
    Lunar, planetary & long exposure
  • Backfocus distance
    83.2mm
  • Tube material
    Steel
  • Length of optical tube
    27.5 in.
  • Weight, optical tube
    16.0 lbs.
  • Additional included accessories
    12V cooling fan with battery pack (req. 8 AA), Pair of hinged, felt-lined tube rings, 2" extension tube for visual use
  • Other features
    Center-marked primary mirror for collimation
  • Warranty
    One year

8" f4 optical tube assembly
8x50 finder scope and bracket
12V cooling fan (installed)
Pair of tube rings
2" extension adapter (35mm length)
Quick-collimation cap
Vixen-style dovetail mounting bar
2.5mm and 5mm Allen wrenches

Orders received by 1pm Eastern Standard Time for in-stock items ship the same business day. Order received after noon 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
Standard Delivery to Canada: $25.00
3 Day Delivery: $25.00
2 Day Delivery: $25.00
Next Day Delivery: $25.00

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