Home » News & Blogs » Celestron’s NexStar 102SLT Review
Bookmark and Share
Telescopic Watch

Celestron’s NexStar 102SLT Review

10 May 2019, 05:54 UTC
Celestron’s NexStar 102SLT Review
(200 words excerpt, click title or image to see full post)

Celestron’s NexStar 102SLT is a surprisingly decent entry by Celestron into the low-priced GoTo telescope market. With a sturdy mount, a wide field of view, enough aperture to actually see the deep-sky objects that the hand controller will guide you to, and quality optics and mechanics, it would certainly be one of the better computerized telescopes under $500 out there, though for beginners I continue to steadfastly hold by my recommendation of a larger manual Dobsonian.
This telescope is not to be confused with the 102GT, which has a longer f/10 focal ratio which strains the mount as well as cheaper accessories. The 102GT is typically found at big-box stores.
However, with all consumer-priced telescopes, the NexStar 102SLT has limitations, so let’s go over those in this review.
Overview of NexStar 102SLT

The Optical Tube

The NexStar 102SLT is a 102mm (4”) f/6.47 achromatic refractor, thus with a focal length of 660mm. Being a standard Fraunhofer doublet achromatic refractor with crown and flint glass lenses, the 102SLT does show chromatic aberration or “false color”, which is worsened by the fast f/6.47 focal ratio. The Moon and planets are still observable, of course, but the sharpest views can be obtained with ...

Latest Vodcast

Latest Podcast

Advertise PTTU

NASA Picture of the Day

Astronomy Picture of the Day