Orion StarBlast 4.5 Astro Reflector Telescope

This Orion StarBlast 4.5 Astro Reflector Telescope is a compact grab-and-go telescope designed for entry-level and intermediate astronomy enthusiasts. It will be sure to inspire the whole family's natural inclination to explore and will be enjoyed hour after hour under the stars!

It's a popular choice by even experienced astronomers for its substantial 4.5" aperture and fast f/4 focal ratio. This StarBlast 4.5 Astro provides bright, detailed views of solar system targets like the Moon and planets, as well as wide-field celestial objects like nebulas and star clusters!

This telescope can be set on the table, on the ground or any convenient level surface with its low-profile swivel base. This pre-assembled base provides smooth altazimuth motion for easy manual targeting and tracking of celestial objects.

The Orion StarBlast 4.5 Astro Reflector Telescope weighs just 13lbs fully assembled and stands 21" tall, which makes it the perfect "take it with" telescope for road trips, camping, or backyard viewing.

This telescope package includes:

• 20mm (22.5x power) and 10mm (for 45x power) 4-element eyepieces
• EZ Finder II "red dot scope" to accurately aim the StarBlast 4.5 at objects in the sky like the Moon and bright planets
• a precision rack-and-pinion 1.25" focuser built to accept any 1.25"-sized Orion eyepiece or accessory
• built-in base handle for easy transportation
• Orion E-Series 1.25" 13% Transmission Moon Filter to reduce glare and boosts contrast so you can see enjoy more detailed views of lunar surface features
• Orion MoonMap 260 that shows locations and names of craters, mountains, valleys, and "seas" of the Moon

We are amazed that you get all of this for under $250 in a telescope that is still very portable! Includes complete instructions to get you observing the sky quickly. Ships in one box with some assembly required. For help finding the telescope that's right for you, see our Selecting a Telescope guide

Most night sky observing is done in the range of 25x-150x. The Orion telescopes we offer have excellent optics at these magnification levels, even up to 250x, ensuring you will enjoy your night sky viewing.

More Information

• StarBlast 4.5 Astro Reflector Telescope Product Manual

• StarBlast 4.5 Astro optical tube
• Base (with installed eyepiece rack)
• 20mm 4-element eyepiece
• 10mm 4-element eyepiece
• EZ Finder II reflex sight
• Orion E-Series Moon Filter
• Orion MoonMap 260

• Best for viewing: Brighter deep sky
• Best for imaging: Lunar & planetary
• 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: Bertele 20.0mm,10.0mm (1.25")
• Magnification with included eyepieces: 23x, 45x
• Resolving power: 1.02arc*sec
• Lowest useful magnification 16x
• Highest useful magnification 228x
• Highest theoretical magnification: 228x
• Limiting stellar magnitude: 12.9
• Optical quality: Diffraction limited
• Finder scope: EZ Finder II
• Focuser: 1.25" Rack-and-pinion
• Secondary mirror obstruction: 34mm
• Secondary mirror obstruction by diameter: 30%
• Secondary mirror obstruction by area: 9%
• Mirror coatings/over-coatings: Aluminum & Silicon Dioxide
• Mount type: Dobsonian
• Astro-imaging capability: Simple moon shots
• Computerized compatibility: Not compatible
• Bearing material: PTFE and UHMW bearings
• Tube material: Steel
• Tripod material: Wood
• Length of optical tube: 17.8 in.
• Weight, optical tube: 5.6 lbs.
• Weight, mount/tripod: 5.3 lbs.
• Weight, fully assembled: 10.9 lbs.
• Additional included accessories:
• Orion MoonMap 260 reference map
• Orion Moon Filter
• Eyepiece rack holds three 1.25" eyepieces
• Other features
• Integrated carrying handle on base
• Dovetail finder scope shoe
• Center-marked mirror for precise collimation
• Warranty: One year
• Focuser height at zenith: 21 in.