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Orion - Starblast 4.5 Imaging Optical Tube Assembly


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Availability: Place your order to join our wait list - no deposit required.


Place your order to join our wait list - no deposit required.

Manufactured by: Orion

Orion - Starblast 4.5 Imaging Optical Tube Assembly


Orion Starblast 4.5 Imaging OTA

If you're looking for an exceptional telescope for astrophotography that won't cost you big bucks, then check out this affordable alternative. We've optimized the optics of our popular short-focal-length StarBlast 4.5 to give a fully illuminated field of view with the Orion StarShoot Deep-Space Imager and similar small-chip astronomical CCD cameras. The result is a compact imaging telescope with a price that will please the budget-conscious astrophotographer - beginner or expert - and with the performance that will give pricey refractors a run for their money.

  • 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

With its big 4.5" parabolic mirror and fast f/4 focal ratio, the StarBlast 4.5 Imaging Reflector provides exquisite, high-quality images and it's simply the most affordable astrophotography-optimized scope the market. 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, we slightly widened the secondary mirror 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.

The StarBlast 4.5 Imaging Reflector is offered as tube assembly only, with no accessories. One-year limited warranty.






Additional Information

Name Orion - Starblast 4.5 Imaging Optical Tube Assembly
Manufacturer Orion
Model 09974
Manufacturer Part No 09974
Custom Stock Status Place your order to join our wait list - no deposit required.
Diameter 114mm
Focal Length 450mm
Focal Ratio 4.0
Focuser 1.25" Rack-and-pinion
Highest Useful Magnification 228x
Lowest Useful Magnification 16x
Optical Coatings Aluminum & Silicon Dioxide
Optical Design Reflector (Parabolic)-Soda-lime plate
Optical Tube Steel
Optical Tube Length 18.0 in
Optical Tube Weight 3.7 lbs
Secondary Mirror Obstruction 47mm
Secondary Mirror Obstruction by Area 17%
Secondary Mirror Obstruction by Diameter 41%
Warranty One Year