What does the Celestron 8-24mm zoom cover?

Focal lengths from 8 to 24 mm in a 1.25 inch barrel, changed by twisting the barrel. I start at 24 mm, its widest field, to find the target and then zoom in.

Can you use two of them in a binoviewer?

I tried two in my binoviewer on the Orion Nebula. The view was immersive, but I could not get two perfectly aligned, clean images, likely because the two zooms were not at exactly the same magnification.

What eye relief does it have?

Celestron lists 6 mm of eye relief and a fold-down eyecup.

Where can I buy the Celestron 8-24mm zoom?

The prices I recorded: £99 at Rother Valley Optics (UK), in stock; $108 at Agena Astro (US), unavailable; $47 at AliExpress (The outdoor movement Store), Global, listed.

What have I not tested on the 8-24mm zoom?

I have not measured its sharpness at each focal length or checked the apparent field at each end of the zoom.

Celestron 8-24mm Zoom Eyepiece review: 8 to 24 mm in one twist

Where does it rank on our leaderboard

Nine of the 46 accessories on my board, against price
Rank	Accessory	Stars for Your Buck	Recorded UK price
1	GEMINI EAF	100 out of 100	£42
2	Generic Dew Heater	93 out of 100	£9
4	Telescope Cover	90 out of 100	£25
12	Celestron 8-24mm Eyepiece	82 out of 100	£99
17	Red light headlamp	77 out of 100	£6
31	ZWO TC40 Tripod	60 out of 100	£342
37	ToupTek StellaVita	46 out of 100	£299
45	SKY ROVER 2x54 Binoculars	28 out of 100	£139
46	365 Solar Telescope Cover	5 out of 100	£73

Contents

01 Where does it rank on our leaderboard
02 Specifications and features
03 In use
04 In my words
05 Watch it in my videos
06 Should you buy it?
07 Questions and more about this review

In 30 seconds

Stars for Your Buck 82/100

Reviewed 13 Dec 2023 Updated 25 Sep 2026

Rank: #12 of 46 accessories
Verdict: Damon recommends

Written by Damon Scotting 3 min read

Buy it if

You want one eyepiece that goes from low to high power without swapping
You like to find a target wide at 24 mm and then zoom in on it
You observe visually through a 1.25 inch focuser or diagonal

Skip it if

You want the same wide apparent field at every focal length: it varies across the zoom
You want to pair two in a binoviewer: both zooms must sit at exactly the same magnification to give one clean, aligned image
You only image with a camera at the focuser

“Highly recommend getting one of these just for the sole experience, essentially being able to travel through space as you twist the barrel and venture towards your target.”

Specifications and features

Celestron 8-24mm Eyepiece reviewed #12 of 46
Recorded UK price	£99
Model	Celestron 93230
Focal length	8 to 24 mm (zoom)
Barrel	1.25 inch
Apparent field	40 to 60 degrees
Field stop	4.6 mm
Optical design	6 elements in 4 groups, fully multi-coated
Eye relief	6 mm
Eyecup	Fold-down
Filter threads	Yes
Body	Aluminium
Weight	225 g
Dimensions	45.5 x 45.5 x 109 mm

In use

Five frames from my video

Two of the zooms in my hands

The zoom, ready to go in

Beside the focuser

In the focuser

At the eyepiece on the Orion Nebula

In my words

“You're constantly finding yourself having to swap between different eyepieces in order to change the magnification of the telescope. A zoom eyepiece allows you to do this all in one fluid motion by just twisting the barrel ever so slightly.”

From my 9 coolest accessories video

“I'm going to turn it all the way out to 24 mm, which is effectively the widest field of view. This will make it easy to find my target.”

From my 9 coolest accessories video

“I've actually got two zoom lenses, the exact same types of lenses, and I'm going to be using them with this set of binoviewers.”

From my 9 coolest accessories video

Watch it in my videos

The 9 COOLEST Accessories for ASTRONOMY! · published 13 December 2023 · 17:00 · Watch on YouTube · 19,597 views, 974 likes on 2 Oct 2026

Jump to

0:32 Zoom eyepieces
1:24 Zooming in on the Orion Nebula
3:06 Two zoom eyepieces in a binoviewer

Should you buy it?

82/100 Stars for Your Buck

Pros

One eyepiece covers 8 to 24 mm: a twist of the barrel changes the magnification with no eyepiece swap.
At 24 mm it gives its widest field, which makes the target easy to find before zooming in.
Zooming in on the Orion Nebula felt like travelling towards it.
Fully multi-coated, with a fold-down eyecup, a filter-threaded barrel and an aluminium body, by Celestron's table.

Cons

Celestron lists only 6 mm of eye relief.
The apparent field changes as you zoom, 40 to 60 degrees by Celestron's figures.
First Light Optics does not stock it; in the UK it comes from Rother Valley Optics at £99.

That is the best view I've ever had of the Orion Nebula.

Three alternatives I have reviewed

Questions and more about this review

Reviewed by

Damon Scotting

The Telescope Man Verified

BSc (Hons) Physics with Astrophysics and Cosmology, Loughborough University PGCE / QTS, University of Nottingham

About Damon About Damon Damon Scotting is The Telescope Man. He holds a BSc (Hons) in Physics with Astrophysics and Cosmology from Loughborough University and a PGCE with QTS from the University of Nottingham, and taught physics in secondary schools before becoming an astronomy creator. He is a contributing writer for BBC Sky at Night Magazine and the author of 42 Wonders of Our Night Sky, and his photograph of the galaxy M100 with the dwarf planet Ceres was Highly Commended in the Astronomy Photographer of the Year 2024 competition run by Royal Observatory Greenwich. He has appeared on the BBC's Blue Peter. More than 750,000 people follow his astronomy channels on YouTube, Instagram and TikTok, and he has reviewed more than 140 telescopes, mounts, cameras, filters and accessories hands-on for this site. More about Damon · How I test · Damon's book

I review all kinds of gear: most of it I buy, some is gifted and some is loaned, and all of it is reviewed the same way. How this site is funded

Five questions, answered

Questions about the Celestron 8-24mm Eyepiece

Reviewed 13 December 2023 ·Updated 25 September 2026

I review all kinds of gear. Most of it I buy, some is gifted and some is loaned, and all of it is reviewed the same way: no company sees or approves a review before it is published. Shop links marked Ad are affiliate links: I earn a commission when you buy through them, at no extra cost to you. How this site is funded

What does the Celestron 8-24mm zoom cover? Focal lengths from 8 to 24 mm in a 1.25 inch barrel, changed by twisting the barrel. I start at 24 mm, its widest field, to find the target and then zoom in. The specifications ↓
Can you use two of them in a binoviewer? I tried two in my binoviewer on the Orion Nebula. The view was immersive, but I could not get two perfectly aligned, clean images, likely because the two zooms were not at exactly the same magnification. Watch it in my videos ↓
What eye relief does it have? Celestron lists 6 mm of eye relief and a fold-down eyecup. The specifications ↓
Where can I buy the Celestron 8-24mm zoom? The prices I recorded: £99 at Rother Valley Optics (UK), in stock; $108 at Agena Astro (US), unavailable; $47 at AliExpress (The outdoor movement Store), Global, listed. A record, not a live price The verdict, the readers and the sellers ↓
What have I not tested on the 8-24mm zoom? I have not measured its sharpness at each focal length or checked the apparent field at each end of the zoom.