Orion - Starblast 4.5 Imaging Optical Tube Assembly

    * 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


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.

With its big 4.5" parabolic mirror and fast f/4 focal ratio, the StarBlast 4.5 Imaging Reflector provides exquisite, high-quality
images ó 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.

Product Specifications:
Use 	Astronomy
User level 	Level 1
Optical design 	Reflector
Optical diameter 	114mm
Focal length 	450mm
Focal ratio 	4.0
Optics type 	Parabolic
Glass material 	Soda-lime plate
Eyepieces included 	None
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 by diameter 	41%
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
Length of optical tube 	18.0 in.
Weight, optical tube 	3.7 lbs.
Other features 	secondary mirror w/47mm minor axis
Warranty 	One year