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Orion StarBlast 4.5" Imaging Reflector Optical Tube with Software

SKU: ONSB45OT MFR: 09974
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About the Orion StarBlast 4.5"" Imaging

The Orion StarBlast 4.5 Imaging Reflector Optical Tube provides exquisite, high-quality images with its big 4.5" parabolic mirror and fast f/4 focal ratio. Unlike refractors, the StarBlast introduces no chromatic aberration with negligible coma. The fast focal ratio also minimizes exposure time and guiding errors. To achieve 100% illumination with the StarShoot Deep Space Imaging Camera, the secondary mirror is slightly widened and extended the focal point further out in the focuser.

The short focal length provides a wide field of view for imaging with small-chip CCD cameras. While the telescope works with standard 1.25" eyepieces (Sirius Plossl recommended) some wide-field eyepieces may require the use of an extension tube to reach focus. At only 3.7 lbs, the StarBlast doesn't require a heavy mount and it transports easily to your favorite site. The 1.25" focuser accepts 1.25" eyepieces for visual use as well.

Orion StarBlast 4.5"" Imaging Includes

  • Orion Optical Tube Assembly
  • Dust Cap
  • Starry Night Special Edition Software
  • Orion 1 Year Limited Warranty

Orion StarBlast 4.5"" Imaging Features

  • Simply the most affordable astrophotography-optimized telescope available
  • Big 4.5" primary mirror and fast f/4 focal ratio produce stunning images with short exposure times
  • Fully illuminates Orion StarShoot Deep Space Imager and other small-chip CCD cameras
  • Compact, lightweight, easily transportable and works with 1.25" eyepieces for observing
  • Offered as an optical tube assembly only, no accessories

Orion StarBlast 4.5"" Imaging Specifications

Use Astronomy
User level Beginner
Optical design Reflector
Optical diameter 114mm
Focal length 450mm
Focal ratio f/4.0
Optics type Parabolic
Glass material Soda-lime plate
Eyepieces included No
Resolving power 1.02arc sec
Lowest useful magnification 16x
Highest useful magnification 228x
Limiting stellar magnitude 12.9
Optical quality Diffraction limited
Focuser 1.25" Rack-and-pinion
Secondary mirror obstruction 47mm
Secondary mirror obstruction 41% by diameter
Secondary mirror obstruction by area 17%
Mirror coatings/over-coatings Aluminum & Silicon Dioxide
Mount style Optical Tube without Mount
Astro-imaging capability Lunar, planetary & long exposure
Tube material Steel
Other features Secondary mirror with 47mm minor axis
Length of optical tube 18.0 in
Weight, optical tube 3.7 lbs
Warranty Orion 1 year limited warranty
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