Celestron

Celestron C5

Ranked #15 in Telescopes

58 LP on the category ladder what's LP?

The C5’s 5-inch aperture and need for frequent collimation make it less suitable for casual use, favoring more experienced users.

Consolidated from 12 cited sources across 11 outlets

Where the cited sources landed, as we read them

5 positive sources
3 mixed sources
1 unconvinced source

See the sources

Flagged as a product to avoid

4 of 5 research runs entered this as a product to avoid rather than a pick.

Poor optics and a short warranty period undermine its value proposition.
Flagged 29 July 2026

Poor optics and a short warranty period undermine its value proposition.
Flagged 29 July 2026
Its optics are mediocre compared to the 70AZ and Inspire 100AZ, making it a poor value.
Flagged 29 July 2026
The C5 is marketed as a compact scope, but reviewers point out its limited aperture (5 inch) and the fact that it requires frequent collimation and careful setup. It is better suited to experienced users than to the typical buyer.
Flagged 13 September 2026
Lacks the image quality and ease of use of newer scopes.
Flagged 13 September 2026

Why the boards include products to avoid

Check price

Pros & cons

✓ Compact size
✓ Affordable starter scope

✗ Limited aperture
✗ Requires frequent collimation
✗ Careful setup needed
✗ 5-inch f/10 SCT
✗ Older optics

The sources behind this ranking

We searched the web and YouTube for what has been published about this product, then read the articles, video transcripts and comments we found.

Evidence 8 articles, 3 video reviews and 1 community source

5 positive sources

T r/telescopes u/longshot201 · owner

I would definitely buy this for that price after you check it out. Use a planet that is up right now (Saturn) and both of those eyepieces to check the optics. The optics should give you a really crisp, beautiful view. Don’t expect the go to on that scope to work very well. This was actually my first scope about 25 years ago when these were new. I wound up selling it and buying a 6 inch Orion dob.

Read thread B

Bogdan Damian Bogdan Damian · 12.5K subscribers · May 2024

It is said that a small five or 6 in Schmidt categoran telescope is the perfect allrounder instrument for observing planets, the moon and brighter DSOs as well as for taking the first steps in the world of astrophotography and I'm inclined to agree with this idea.

Watch A American Gun Works Admin · reviewer · May 2026

Its rugged build and simple operation make it an excellent choice for photographers and outdoor observers alike.

Read A

Astronomycorner Article

The C5+ received a favorable review in Sky and Telescope in 1993, which ensured its success for a while.

Read C

Cloudynights Article

This scope is fairly eyepiece-friendly when used at it's native f/10.

Read

3 mixed sources

Cloudynights Article

The other options in the 5" range are the Celestron C5 and one of the 5" Mak-Cass; the former is ideally better for portability being a bit smaller and lighter but is also noticeably more expensive (roughly +200€), and you need also a fairly sturdy phototripod and a fitting head (again, the C5 may allow to skimp a bit on tripod/head).

Read A

AstroScope AstroScope · 12.9K subscribers · Jul 2016

Visual back end also has an external thread but unfortunately this is not a T-thread, and for installing cameras will have to additionally acquire not only the T-ring, but also a t-adapter. For use with visual backing. not bad direct image prism with a break in the optical axis 45 degrees. Prism is perfect for ground observations and will be quite acceptable for astronomical.

Watch S

Skiesandscopes Article

Pros: Large aperture for great and clear views of objects in the night sky like the moon, the planets, and even other galaxies

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1 unconvinced source

Deep SkyLab Deep SkyLab · 4.4K subscribers · May 2026

The C5 is a lot closer in size and portability. Let me grab it off the wall here. And the MK127 only has about 2% more aperture by diameter. I think this is 125, this is 127. Um but it has 20% more focal length. And in my sample, the MK127 looked sharper both visually and in imaging than my sample of a Celestron C5. That said, SCTs can vary a lot from unit to unit.

Watch

3 stance not read sources

Telescopic Watch Article · Feb 2026

Using Celestron’s C5 SCT optical tube atop the StarSense Explorer mount, the StarSense Explorer DX 5” doesn’t have views any better than a typical 130 mm reflector model. In fact, it’s quite a bit inferior in performance. But it is slightly steadier and more compact thanks to the C5 optical tube’s Schmidt-Cassegrain design. However, it lacks motorized tracking like most similarly sized scopes in t

Read S

Space.com Article Read W

Wirecutter Article Read

Frequently asked questions

It ranks #15 of 15 on our telescopes tier list, in F tier. That placement draws on 12 cited sources across 11 outlets.

1 of the 9 sources with a clear view is critical of it: Deep SkyLab. Limited aperture. Requires frequent collimation. Careful setup needed. 5-inch f/10 SCT. Older optics.