(Last Updated On: December 4, 2019)

StarBlast 4.5 is one of the top beginners or starter telescope from Orion. Scope provides the amazing way to learn about astronomy. With 4.5 inch aperture, decent optics and affordable price tag this device is a great gift for curious youngsters interested in space and stars. It will surely inspire beginner stargazers night after night to go to the next level of astronomy.



Optical design: Reflector

Optical diameter: 114mm

Focal length: 450mm

Focal ratio: f/4.0

Optics type: Parabolic

Glass material: Soda-lime plate

Eyepieces: Plossl 25.0mm, 10.0mm (1.25″)

Magnification with included eyepieces: 18x, 45x

Resolving power: 1.02arc*sec

Lowest useful magnification: 16x

Highest useful magnification: 228x

Limiting stellar magnitude: 12.9

Optical quality: Diffraction limited

Finder scope: EZ Finder II

Focuser: 1.25″ Rack-and-pinion

Our Rating: 4.5 out of 5

Review & Pros

As the name suggests Orion StarBlast 4.5 comes with 4.5-inch aperture and uses a mirror to gather the incoming light. The aperture of the telescope is large enough to collect a lot of light from night sky which results in a bright clear image. The device also features a short 450mm focal length and a focal ratio of f/4 helps telescope to give brighter and wider field of view at any magnification. The wider field of view and bright image allows the user to quickly locate the desired celestial objects.

In addition to large aperture and decent optics StarBlast 4.5 also feature a limiting stellar magnitude of 12.9. This large number of Steller magnitude describes telescope is capable of revealing a huge number of celestial objects which otherwise is not possible with our naked eye.

In addition, StarBlast 4.5 comes with two high-quality eyepieces. Package includes 4-element 25mm and 10mm Plossl eyepiece where 25mm gives a wider view and up to 18x magnification and 10 mm gives magnified view up to 45x magnification. To locate any object in the sky start with 25mm eyepiece first once the object is located change the eyepiece to 10mm to view the object at full magnification.

Reviewers report that in a perfect viewing condition they were able to locate Jupiter and its four moons, Saturn, and its beautiful rings and also craters and mountains on Moon in details.

In addition to the wider field of view and great eyepieces, StarBlast 4.5 provides an easy to use equatorial mount with height adjustable tripod to easily track celestial objects as they move in the sky by simply twisting the knob. In future, Users can also attach additional motor drive to make the process of tracking fully automatic. The beauty of this mount is anyone in the family, from elder member to small children can enjoy the view for the long duration of time simply by twisting the slow- motion knob.

Orion has included EZ finder II reflex sight where it projects a red dot into the sky. To use it, move the telescope until the red-dot is aimed at the area of sky you want to see in the telescope.



Difficult to setup- One common problem reviewer’s report with StarBlast 4.5 that instruction manual provided with this telescope is a total waste. Beginners find it difficult to assemble the Telescope with help of manual but they appreciated the fact that Orion has provided a video tutorial on YouTube to solve the problem.

Needs to be collimated- StarBlast 4.5 is a reflector telescope that uses a mirror which sometimes needs to be perfectly aligned or collimated. Read,

How to collimate a telescope?

The article will help you to collimate your telescope in less than 5 minutes. Users can also take help of YouTube tutorial to understand the process.


Two Models

Before making buying decision user should keep in mind that Orion has listed two different model of StarBlast 4.5 equatorial reflector telescope on Amazon. The Older one has Expanse eyepiece whereas newer model has High-quality Plossl Eyepiece with same optics. In our Opinion, newer model with the Plossl eyepiece is a much better product.

We are providing a link to both products so that you can decide for yourself.

Orion StarBlast 4.5 Equatorial Reflector Telescope (Older Model)


Orion StarBlast II 4.5 Equatorial Reflector Telescope (Newer Model)

Final words

This concludes our StarBlast 4.5 reflector telescope review. Overall a great beginner’s telescope made for starters and kids. Wide field of view, great optics, decent aperture and equatorial mount and its weight (20lbs) are some features which make this telescope a serious choice for anyone willing to enjoy the night sky.


Take a look at more features and the best price on Amazon right now!!!





Some useful links:-

Best Books for Astronomy

Astronomy Based Gifts Items





Review Date
Reviewed Item
Orion StarBlast 4.5 Equatorial Reflector Telescope
Author Rating

1 Comment

cast · October 18, 2017 at 12:26 pm

magnificent post, very informative. I wonder why the other experts of this sector
do not realize this. You must continue your writing. I’m
sure, you’ve a great readers’ base already!

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