Barlow Lens for Celestron AstroMaster 70AZ: 6 Best Picks Compared (2026)

Updated November 2026

Choosing a barlow lens for Celestron AstroMaster 70AZ comes down to a few practical questions: does it fit a 1.25-inch focuser, how much magnification does it add to the eyepieces you already own, and does the optical coating hold up to the planetary and lunar viewing this small refractor does best. We compared six 1.25-inch barlow options against those criteria, weighing published specifications, brand reputation and the patterns owners tend to report about image sharpness, eyepiece compatibility and build quality.

Our Top Picks

Quick Comparison

Product	Best for	Key feature
Celestron Omni 1.25″ 2X Barlow Lens	Overall fit with a 70AZ	Fully multi-coated optics
Celestron X-Cel LX 2X Barlow Lens	Owners who want a sturdier build	Brass compression ring and removable optical cell
Celestron PowerSeeker Telescope Accessory Kit	Beginners building a first accessory set	Eyepieces, filters and cleaning cloth in one kit
Telescope Barlow Lenses Kit 2X-3X-5X	Trying different magnifications	Three barlow powers in one set
3 Pieces 1.25 inch Astronomical Telescope Barlow Lens 2X 3X 5X	Low-cost experimentation	2X, 3X and 5X options
Astromania 2X Barlow Lens with T-Thread	Attaching a camera adapter	T-thread filter and camera compatibility

Celestron Omni 1.25″ 2X Barlow Lens for Telescope Eyepieces Threaded Barrel

Best for: Overall fit with a 70AZ

This is a straightforward 2X barlow from a major telescope brand, designed for the standard 1.25-inch eyepieces that most AstroMaster 70AZ owners use. It suits beginners who want one reliable upgrade that doubles what their existing eyepieces can do.

Key specs

• Magnification factor: 2X
• Barrel size: 1.25-inch
• Threaded barrel for eyepiece attachment
• Fully multi-coated optics
• Blackened edges to reduce internal reflections

Pros

• Doubles the magnification of every compatible eyepiece
• Multi-coated glass helps keep the view bright
• Threaded barrel holds eyepieces securely

Cons

• A 2X barrel shortens the usable field, so wide views become narrower
• Pairing with very short-focal-length eyepieces can leave the image dim on a small aperture

Bottom line: The safest first pick for someone who wants a single, well-known 2X barlow for planets and the Moon with a 70AZ.

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Celestron X-Cel LX 2X Barlow Lens for Telescope Eyepieces – 1.25″

Best for: Premium build

This barlow targets owners who want a sturdier, more refined accessory than a basic barrel. It fits anyone planning to keep the lens for years and to move it between eyepieces and, possibly, other scopes.

Key specs

• Magnification factor: 2X
• Barrel size: 1.25-inch
• Brass compression ring for secure eyepiece holding
• Removable optical cell for cleaning
• Fully multi-coated optics

Pros

• Brass compression ring holds eyepieces firmly without wobble
• Removable optical cell makes cleaning easier
• Durable housing suits frequent use

Cons

• Like any 2X barlow, it narrows the apparent field of view
• The compression ring can require a careful touch to avoid marring eyepiece barrels

Bottom line: A good choice for owners who value build quality and plan to keep the accessory long term.

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Celestron PowerSeeker Telescope Accessory Kit – Eyepieces & Filters

Best for: Best budget pick

This is a bundle rather than a dedicated barlow, but it is useful for beginners who want a complete starter set of eyepieces, filters and cleaning supplies alongside their 70AZ.

Key specs

• Includes 2 Kellner eyepieces
• Includes 3 colored filters
• Includes lens cleaning cloth
• Designed for beginning astronomers

Pros

• Covers several accessory needs in one purchase
• Filters help with lunar and planetary contrast
• Good fit for a first-time buyer

Cons

• Does not offer a dedicated barlow lens as its core item
• Eyepiece focal lengths in a kit may not match what a specific observer wants

Bottom line: Pick this if you want a broad starter kit, and add a dedicated barlow later if magnification is the main goal.

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Telescope Barlow Lenses Kit 2X-3X-5X, 1.25 Inch Telescope Accessory

Best for: Trying different magnifications

A kit with 2X, 3X and 5X barlows lets you experiment with magnification on the 70AZ without buying several separate lenses. It suits observers who want to find the power that works best for their eyepieces and sky conditions.

Key specs

• Magnification options: 2X, 3X and 5X
• Barrel size: 1.25-inch
• Multi-coated broadband glass (per listing)

Pros

• Three magnification factors in one set
• Useful for testing which power suits planetary detail
• Covers a wide range of eyepiece combinations

Cons

• 5X magnification can be too much for a 70 mm aperture under typical seeing
• Build quality varies more across third-party kits than across established brand models

Bottom line: A practical way to learn which barlow power suits your observing, especially for planetary work.

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3 Pieces 1.25 inch Astronomical Telescope Barlow Lens 2X 3X 5X Eyepiece Lens

Best for: Low-cost experimentation

This three-piece set offers the same 2X, 3X and 5X range in a compact package. It suits budget-minded observers who want to explore magnification options before committing to a single premium barlow.

Key specs

• Three barlows: 2X, 3X and 5X
• Barrel size: 1.25-inch
• Designed for standard eyepiece compatibility

Pros

• Covers three magnification steps
• Compact and easy to store with other accessories
• Good for trying different powers on planets

Cons

• Optical quality and coating detail are less documented than with major brands
• Higher powers may reveal softness on a small refractor

Bottom line: A reasonable experiment-first choice, though observers who prioritize sharpness may prefer a brand-name 2X.

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Astromania 2X Barlow Lens for Telescope Eyepiece 1.25 Inch with T-Thread

Best for: Camera work

This 2X barlow includes a T-thread that allows attaching a camera adapter or filter. It is aimed at observers who want to photograph planets and the Moon through the 70AZ with a smartphone or DSLR setup.

Key specs

• Magnification factor: 2X
• Barrel size: 1.25-inch
• T-thread for filter and camera adapter attachment
• Fully multi-coated optics

Pros

• T-thread supports camera and filter accessories
• Doubles eyepiece magnification for planetary imaging
• Multi-coated design helps brightness

Cons

• Camera imaging still depends on seeing, focus and mount stability
• Adapter compatibility must be checked against your specific camera

Bottom line: The best fit for observers who plan to add photography to their 70AZ routine.

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Buying Guide

Barrel size and eyepiece fit

Most 70AZ eyepieces use a 1.25-inch barrel, so confirm that before buying. A 2-inch barlow will not fit a standard 70AZ focuser without an adapter, and mismatched barrels are a common source of frustration.

Good picks for this: Celestron Omni 1.25″ 2X Barlow Lens, Celestron X-Cel LX 2X Barlow Lens

Magnification factor

A 2X barlow doubles the magnification of any eyepiece. A 3X or 5X adds more power, but on a 70 mm aperture the image can become dim and soft once you pass the useful limit set by the scope’s diameter. Many observers find 2X the most usable starting point.

Good picks for this: Telescope Barlow Lenses Kit 2X-3X-5X, 3 Pieces 1.25 inch Astronomical Telescope Barlow Lens 2X 3X 5X

Optical coatings

Look for fully multi-coated or multi-coated optics. Coatings reduce reflections at glass surfaces, helping preserve contrast and brightness, which matters most for planetary detail and lunar terminator views.

Good picks for this: Celestron Omni 1.25″ 2X Barlow Lens, Astromania 2X Barlow Lens for Telescope Eyepiece 1.25 Inch with T-Thread

Build quality and locking

A brass compression ring or a machined housing holds the eyepiece firmly and reduces wobble. A removable optical cell makes cleaning simpler over time, which is useful for anyone who observes outdoors often.

Good picks for this: Celestron X-Cel LX 2X Barlow Lens, Celestron Omni 1.25″ 2X Barlow Lens

Camera and filter compatibility

If you plan to photograph through the scope, check for a T-thread or filter thread on the barlow. The thread lets you attach a camera adapter, though image quality still depends on seeing conditions and mount tracking.

Good picks for this: Astromania 2X Barlow Lens for Telescope Eyepiece 1.25 Inch with T-Thread

Value for a starter setup

Bundles and multi-piece sets can cover several needs at once, especially when you are still learning which magnification you prefer. Check whether the kit includes useful extras such as filters or cleaning cloths before deciding.

Good picks for this: Celestron PowerSeeker Telescope Accessory Kit, 3 Pieces 1.25 inch Astronomical Telescope Barlow Lens 2X 3X 5X

Care and handling

Keep caps on when the barlow is not in use, and clean the glass with a microfiber cloth and a lens-appropriate solution. Avoid touching the glass with bare fingers, since skin oils can affect coatings over time.

Good picks for this: Celestron X-Cel LX 2X Barlow Lens, Celestron PowerSeeker Telescope Accessory Kit

FAQ

Will a barlow lens work with the Celestron AstroMaster 70AZ?

Yes, as long as the barlow uses a 1.25-inch barrel that matches the 70AZ focuser and your eyepieces. Check the barrel size before purchase.

Is a 2X barlow better than a 3X for this telescope?

For many 70 mm refractor owners, 2X is the more forgiving choice. It adds useful magnification for planets and the Moon without pushing the image into a range where detail often breaks down.

Can I use a barlow with any eyepiece?

Most standard 1.25-inch eyepieces work well with a barlow. Very short-focal-length eyepieces combined with a barlow can produce a dim, hard-to-focus image, so test combinations under real sky conditions.

Does a barlow lens reduce the field of view?

Yes. Because a barlow increases magnification, the apparent field of view narrows. This is normal and expected, but it means wide star fields are better viewed without it.

What does multi-coated mean on a barlow?

Multi-coated optics have several thin layers applied to glass surfaces to reduce reflections. Manufacturers generally describe this as improving light transmission and contrast.

Can I attach a camera to a barlow lens?

Some barlows include a T-thread that accepts a camera adapter. Check the thread standard against your camera and adapter, and expect that focus and mount tracking will limit results.

Do I need a barlow for lunar and planetary viewing?

A barlow is one of several ways to add magnification. It is helpful for planets and the Moon, but seeing conditions often limit how much extra power is useful.

Conclusion

For most AstroMaster 70AZ owners, a well-known 2X barlow with a 1.25-inch barrel is the sensible starting point. The Celestron Omni 1.25″ 2X Barlow Lens is a straightforward overall choice, while the Celestron X-Cel LX suits anyone who wants a sturdier build. Beginners who want a broader starter set may prefer the PowerSeeker kit, and observers who want to test several powers can look at the 2X-3X-5X sets. If camera work is the goal, the Astromania model with its T-thread is the most relevant option. Match the barlow to your eyepieces, observing targets and budget, and confirm barrel size before buying.

Sources

• Background on planetary observing, lunar features and how telescope magnification affects what you can see (nasa.gov)
• Resources from the American Astronomical Society on amateur observing and telescope use
• Guidance on eyepieces, telescope accessories and observing techniques

Related reading

• Celestron Omni 2X Barlow Lens Review: Is It Worth It?
• Celestron Barlow Lens 3x Review: Is It Worth It?
• 2x Barlow Lens Celestron Review: Is It Worth It?

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