Celestron AstroMaster 90AZ Refractor Telescope
$188.88 price checked August 2026
If you need a lightweight frame with technical support and a two-year warranty, this is the one to price-check.
The AstroMaster 90AZ in Short
The Celestron AstroMaster 90AZ Refractor Telescope is for the budget-conscious beginner who needs a 90mm aperture to clearly resolve lunar craters and Jupiter’s moons.
Many beginner astronomers find their first telescope frustrating when the optics are too small to resolve distinct details on the lunar surface or show clear bands on Jupiter. Poorly designed entry-level scopes often fail to provide the clarity needed to make the hobby rewarding.
The Celestron AstroMaster 90AZ Refractor telescope solves this by providing a 90mm primary mirror. This aperture clears the 70mm threshold required to see lunar craters and Jupiter’s moons clearly.
We evaluated the refractor telescope options we compared to select this model for those prioritizing a high-aperture entry point. This review is for budget-first shoppers who need a reliable first scope without a massive price jump.
If you need a more compact option, see our full review of the AstroMaster LT 70AZ.
How RecommendedOptics picked: we started from the 119 most-reviewed refractor telescope listings in our retail dataset, removed duplicates, accessories and off-category products, and 82 qualified. This product is one of 15 from that pool chosen for a full review. Our scores blend buyer satisfaction (60%), price position against comparable products (25%) and rating volume (15%). Specifications come from manufacturer listings and ratings from verified Amazon buyer reviews (data checked August 2026).
The Short Answer on the AstroMaster 90AZ
Best for: you need a starter telescope that can clearly resolve lunar craters and Jupiter’s moons without a complex equatorial setup.
The Celestron AstroMaster 90AZ is a strong entry point at $188.88.
- Pro: The 90mm aperture clears the 70mm threshold required for clear lunar and planetary detail.
- Pro: It includes an erect image star diagonal and a red dot finderscope to simplify initial alignment.
- Pro: The Altazimuth mount allows for simple up-down-left-right movement.
- Con: The achromatic optics may produce purple fringing around bright objects at high magnifications.
- Con: The manual mount lacks motorized tracking, making it difficult to keep planets in view for long periods.
Don’t buy this if: you require an apochromatic (ED) refractor to eliminate chromatic aberration for high-contrast imaging.
Price assessment: $188.88 is a fair price for a 90mm refractor that includes a complete tripod and accessory kit.
RecommendedOptics score: 7.6/10 (data-driven – see “How we picked” above)
For a more compact design with a shorter tube, view our analysis of the AstroMaster 102AZ.
Key Specifications
| Aperture | 90mm |
| Mount Type | Manual Altazimuth |
| Optics | Fully-coated glass |
| Included Eyepieces | 20mm, 10mm |
| Included Accessories | Tripod, Erect image star diagonal, StarPointer red dot finderscope |
| Warranty | Two-year |
The 90mm aperture clears the 70mm threshold required to resolve lunar craters and Jupiter’s moons clearly.
What the Numbers Mean in Use
Precision Tracking with Panning Handle
The AstroMaster 90AZ features a manual Altazimuth mount and a dedicated panning handle for precision adjustments. This design allows you to move the telescope smoothly across the sky without the mount getting stuck or resisting your movement, which often happens with lower-quality entry-level mounts. You can maintain a steady view on a target as it moves, providing the stability needed to keep objects centered in your eyepiece.
With a 90mm aperture, the AstroMaster 90AZ clears the 70mm threshold required to resolve lunar craters and Jupiter’s moons clearly. You can expect to see the rings of Saturn and the moons of Jupiter because this size exceeds the minimum diameter for clear planetary detail. Because the mount is manual, you will need to physically move the telescope to track objects, but the panning handle ensures those movements remain fluid.
Optical Clarity with Fully-Coated Glass
The AstroMaster 90AZ uses fully-coated glass optics to maximize the light reaching your eye. This coating helps minimize internal reflections and improves contrast, which is vital when viewing faint objects in the night sky. By maximizing light transmission, the optics support high-contrast viewing of lunar features and bright planets.
You should check the specific focal length and magnification limits provided by the manufacturer to ensure your desired targets stay within the clear field of view. While the 90mm aperture provides the light-gathering power for major celestial bodies, the fully-coated glass ensures that the image remains sharp rather than washed out by glare.
Ease of Use with Red Dot Finder
The AstroMaster 90AZ includes a StarPointer red dot finder to simplify the process of locating objects. You can use the red dot to quickly identify a target in the sky before centering it with the main telescope, which significantly reduces the time spent searching for planets or constellations. This simplifies the initial setup and helps you find your targets much faster than using the main eyepiece alone.
The included 10mm and 20mm eyepieces provide different magnification levels for your observations. The 20mm eyepiece offers a wider field of view for finding larger constellations, while the 10mm eyepiece provides higher magnification for closer looks at the Moon and planets. These tools, combined with the red dot finder, give you a structured way to navigate the night sky.
How the AstroMaster 90AZ Compares to Alternatives
The AstroMaster 90AZ provides a 90mm aperture, which clears the 70mm aperture threshold required to resolve lunar craters and Jupiter’s moons clearly.
- The AstroMaster 90AZ is the highest-rated option in our comparison with a 4.4 rating.
- The AstroMaster 90AZ costs $0.29 more than the SpectrumOI TourStar Pro 90 AZ.
- The AstroMaster 90AZ costs $1.11 less than the Orion StarBlast 90mm Altazimuth Refractor Telescope.
- The AstroMaster 90AZ costs $2.66 more than the ZH-Wang MF40070 Refractor Telescope.
- The AstroMaster 90AZ costs $7.11 less than the 114mm Refractor Telescope.
- The AstroMaster 90AZ costs $8.89 more than the 70mm Aperture 700mm Focal Length Refractor Telescope.
If you prioritize a lower entry price over a larger aperture, you should choose the 70mm Aperture 700mm Focal Length Refractor Telescope instead of the AstroMaster 90AZ.
Regarding the 70mm model for a beginner, the AstroMaster 90AZ offers a larger 90mm aperture compared to the 70mm option. This extra size provides better resolution for lunar and planetary viewing, though you should check the specific focal length of the 70mm model to determine if it meets your specific magnification needs.
You might also consider the value provided by our spec breakdown of the Gskyer Refractor Telescope.
Is the Price Right?
The Celestron AstroMaster 90AZ sits at the $188.88 mark, which is $1 above the $179.99 to $195.99 range of the similar refractor telescope products we compared. At this price point, you gain a 90mm aperture that clears the 70mm threshold required to resolve lunar craters and Jupiter’s moons clearly. Because it uses an achromatic design rather than an apochromatic (ED) system, you trade off the elimination of color fringing for a more accessible entry point into amateur astronomy.
To start using it tonight, you do not need to purchase additional accessories as the package includes a 20mm eyepiece, a 10mm eyepiece, a tripod, an erect image star diagonal, and a StarPointer red dot finderscope. Check the manufacturer’s current list of included software to see if the free download is still available for your operating system.
Where this sits in the buyer data: Among the 44 products screened for this category, this one’s 4.4 rating places it #9, on 4,612 ratings – above the 37-rating median of that group, so the average rests on more feedback than most of its comparables. On price it undercuts 34 of them.
To see how other models compare, view our roundup of the best 80mm refractor telescope.
What Buyers Still Want to Know About the AstroMaster 90AZ
Is the tripod sturdy enough to stay still when I’m looking at the moon?
The AstroMaster 90AZ includes a tripod and a panning handle designed to provide stable tracking during lunar observations. Because the 90mm aperture clears the 70mm aperture threshold for resolving lunar craters, the mount’s stability is a key factor in maintaining a clear view of the moon’s surface.
Is it easy to put together and get it aligned for a kid to use?
The AstroMaster 90AZ features an Altazimuth mount and a StarPointer red dot finderscope to simplify the alignment process for beginners and children. You should check the included manual to confirm the specific assembly steps for the lightweight frame and tripod.
What is the magnification limit of the AstroMaster 90AZ?
Magnification limits depend on the 90mm primary mirror and the included 10mm and 20mm eyepieces. To avoid a blurry image caused by magnification over-rating, you should verify the maximum useful magnification for a 90mm aperture before choosing higher-power accessories.
Does the AstroMaster 90AZ come with enough accessories to start?
Yes, the package includes a 20mm eyepiece, a 10mm eyepiece, a tripod, an erect image star diagonal, and a StarPointer red dot finderscope. These components provide the necessary tools to begin observing celestial objects immediately upon assembly.
Understanding the different designs is easier when you see the various types of refractor telescopes explained.
Is the AstroMaster 90AZ Right for You?
The AstroMaster 90AZ suits 4 kinds of buyer and is the wrong choice for 3 jobs, listed below with the reason for each.
Who the AstroMaster 90AZ is for, and what it does well
Who the AstroMaster 90AZ suits
- Middle school science teachers — the included astronomy software and red dot finderscope make it easy to demonstrate celestial navigation in a classroom
- Parents of children interested in space — the lightweight frame and manual Altazimuth mount make it easy for kids to handle and operate
- Backyard hobbyists on a budget — the $188.88 price point and included 20mm/10mm eyepieces provide a complete entry-level kit
- College astronomy students — the 90mm aperture and fully-coated glass optics provide clear views for learning basic lunar and planetary features
What the AstroMaster 90AZ handles well
- Lunar crater observation — the 90mm primary mirror provides enough light gathering for clear moon details
- Basic planetary viewing — the 10mm eyepiece allows for higher magnification of planets like Jupiter and Saturn
- Guided star hopping — the StarPointer red dot finderscope helps users locate specific constellations quickly
- Steady tracking of objects — the panning handle allows for precise manual adjustments during observation
- Beginner constellation mapping — the included consumer rated astronomy software helps identify stars and galaxies
What the AstroMaster 90AZ is the wrong choice for
- Deep-sky nebula photography — the 90mm aperture is too small to capture faint, distant nebulae with high detail
- Tracking fast-moving satellites — the manual Altazimuth mount lacks a motorized drive for smooth, long-term tracking
- High-magnification solar observation — the 90mm primary mirror lacks the specialized filters required for safe sun viewing
What to budget alongside the AstroMaster 90AZ, and what to skip
Worth buying at the same time
- Moon filter — to reduce glare and increase contrast when viewing the bright lunar surface
- Barred nebula filter — to enhance the visibility of faint gas clouds in the night sky
- Astronomy chair — to provide a comfortable place to sit while using the tripod for long periods
- Red headlamp — to preserve night vision while consulting maps or the included software
- Protective carrying case — to safely transport the lightweight frame and optics between locations
What you can skip
- Additional low-power eyepiece — the 20mm eyepiece already provides a wide field of view
- Basic tripod — the product already includes a tripod in the box
- Basic star diagonal — the included erect image star diagonal already allows for upright viewing
- Entry-level finderscope — the StarPointer red dot finderscope is already included
Where to Buy the AstroMaster 90AZ
These retailers sell Refractor Telescope generally – we do not track which of them has this particular model in stock, so check availability and the current price with the retailer before making a trip.
- Target (online and physical stores) — convenient in-store pickup for basic starter scopes
- B&H Photo Video (online only) — reliable shipping and professional photography/optics expertise
- High Point Scientific (online only) — specialist retailer with expert staff and technical advice
- Orion Optics (online only) — specialist retailer with a wide range of dedicated astronomy gear
- Amazon (online only) — wide selection of entry-level and mid-range brands
- Walmart (online and physical stores) — physical availability for common beginner models
Final Verdict on the AstroMaster 90AZ
If you need a beginner refractor telescope that clears the 70mm aperture threshold for viewing lunar craters and Jupiter’s moons, the Celestron AstroMaster 90AZ is the right choice at around $188.88.
The AstroMaster 90AZ ranks well for entry-level users because it provides a 90mm primary mirror and includes a StarPointer red dot finderscope to simplify finding objects in the night sky.
Skip it if: you require an apochromatic (ED) lens to eliminate color fringing or need an equatorial mount for long-exposure tracking.
Every Refractor guide in this category
- Choosing the Best Refractor Telescope for Adults
- The Refractor Telescopes That Work Best for Portable Use
- Beginner Refractor Telescopes for Stargazing Compared
- Choosing the Best Refractor Telescope for Kids
- The Refractor Telescopes That Work Best for Travel
- Which 90mm Refractor Telescope Is Best for Astronomy?