Celestron Nexstar Evolution 9.25" 235mm Schmidt Cassegrain Telescope

The NexStar Evolution 9.25 is for the observer who wants serious visual performance without giving up the convenience that makes the Evolution system so enjoyable to use.

Its substantial 235mm aperture brings a huge range of the night sky within reach. Globular clusters resolve into rich fields of stars, galaxies and nebulae become genuinely rewarding objects to explore, and the additional resolving power gives the telescope exceptional potential for fine lunar and planetary detail when atmospheric conditions allow.

Celestron’s 9.25-inch Schmidt-Cassegrain optical tube has also developed an enviable reputation among experienced observers for its optical performance. Combined with StarBright XLT coatings, it is a superb all-round visual telescope rather than simply a specialist planetary instrument.

There is a 2350mm focal length inside the optical system, yet the tube itself is only around 56cm long. That is one of the great advantages of the Schmidt-Cassegrain design: substantial aperture and a long focal length are contained within a relatively compact optical tube rather than an exceptionally long telescope.

The Evolution system then makes all that viewing capability remarkably accessible. Once aligned, choose an object using Celestron’s SkyPortal app or the supplied NexStar+ hand controller and the telescope slews to the selected target, then continues tracking it while you observe.

Its rechargeable lithium-iron-phosphate battery is built directly into the mount, providing up to approximately 10 hours of operation without the external power pack commonly required by many computerised telescopes.

The Evolution 9.25 is a substantial telescope, but deliberately so. It is the model for someone who places visual capability high on the priority list while still wanting intelligent GoTo, automatic tracking and practical modern design. For a first-time telescope owner prepared to invest in an exceptional system from the outset, or an experienced observer wanting serious aperture with exceptional convenience, it offers considerable long-term observing potential.

Why Choose the NexStar Evolution 9.25?

• Powerful 235mm optics — explore galaxies, nebulae and spectacular star clusters while revealing impressive fine detail on the Moon and planets.
• Highly regarded C9.25 Schmidt-Cassegrain design — an established all-round optical system with a strong reputation among experienced observers.
• Automatic GoTo and tracking — choose a target and the telescope slews to it, then follows it while you observe.
• Built-in Wi-Fi with NexStar+ hand controller included — use SkyPortal on a compatible phone or tablet, or operate the telescope with traditional physical controls.
• Internal rechargeable LiFePO₄ battery — provides up to approximately 10 hours of observing without a separate external power supply.
• Compact optical design — combines 235mm aperture and a 2350mm focal length in an optical tube around 56cm long.
• Heavy-duty Evolution platform — brass worm gearing and a heavy-duty 2-inch stainless-steel tripod support this substantial optical system.

What Can You See?

With 235mm of aperture, deep-sky objects become a major part of the observing experience. New Zealand’s southern sky offers outstanding targets including Omega Centauri and 47 Tucanae, where large globular clusters can break into extraordinary numbers of individual stars, and the Carina Nebula with its extensive mixture of nebulosity and star fields. Galaxies such as Centaurus A and the Sculptor Galaxy are also excellent targets, with darker skies bringing fainter galaxies and nebulae within reach and revealing more structure in brighter objects.

The Moon and planets can be equally impressive. Saturn’s ring system is beautifully defined, with the Cassini Division visible when conditions allow. Jupiter can reveal its major cloud belts, Galilean moons and finer atmospheric detail, while Mars can show surface markings when favourably positioned. The Moon becomes an intricate landscape of crater walls, mountain ranges, ridges, valleys and sharply defined shadows.

You do not need to live beneath a remote dark sky to justify a telescope of this size. The Moon, planets, double stars, globular and open clusters and a range of brighter nebulae and galaxies remain rewarding from New Zealand towns and cities. Darker skies simply allow the 235mm aperture to reach further and show more of what it is capable of.

How NexStar Evolution Works

Celestron’s SkyAlign system makes computerised observing accessible even if you do not already know the night sky. Once the telescope has established its orientation from three bright reference objects, you can select what you want to observe and let the GoTo system do the locating.

Built-in Wi-Fi allows a compatible phone or tablet to connect directly to the telescope and use the SkyPortal Powered by SkySafari app as an interactive map of the night sky. Explore what is visible, choose a target and the Evolution slews to its calculated position.

The mount then continues tracking the target as the Earth rotates, allowing you to concentrate on the view through the eyepiece rather than repeatedly repositioning the telescope.

If you prefer physical controls, the supplied NexStar+ hand controller provides full telescope operation without requiring a smartphone or tablet.

Evolution Mount, Power & Other Features

The Evolution mount is a major part of what makes this substantial telescope so straightforward to own and use.

Its built-in LiFePO₄ rechargeable battery provides up to approximately 10 hours of operation, eliminating the external power cable or separate power tank commonly required by many GoTo telescopes. A USB charge port can also top up a compatible phone or other device during an observing session.

High-performance brass worm gears and improved drive motors provide accurate GoTo movement and tracking, while manual altitude and azimuth clutches allow the telescope to be repositioned manually when required.

The 9.25-inch model is supplied with a heavy-duty, adjustable stainless-steel tripod with 2-inch legs, providing the stronger foundation appropriate for its larger optical tube.

This is not a lightweight telescope: the complete system weighs approximately 28.4kg. Importantly, it does not need to be carried fully assembled. The optical tube, mount and tripod separate for transport and setup, with the optical tube itself weighing approximately 9.1kg. Integrated carrying handles further assist with positioning the components.

Celestron’s StarBright XLT coatings maximise useful light transmission through the optical system. For owners interested in imaging, the Evolution 9.25 is particularly strong for lunar and planetary work, while short-exposure deep-sky imaging is also possible. Fastar compatibility and Celestron’s optional HD Pro equatorial wedge provide additional paths if astrophotography becomes a more advanced interest later.

FAQ

Does the Evolution 9.25 need an internet connection while I am observing?

No. The telescope has its own built-in Wi-Fi network, allowing a compatible phone or tablet to communicate directly with the mount. The SkyPortal app should be installed beforehand.

Is the Evolution 9.25 difficult to move and set up?

It is a substantial telescope rather than a lightweight grab-and-go system, but it separates into the optical tube, mount and tripod for carrying and setup. The compact Schmidt-Cassegrain tube and integrated handles make the individual components considerably easier to manage than the complete 28.4kg assembled system.

Smartphone Compatibility

The Celestron SkyPortal app is available for supported iPhone, iPad and Android devices. Because mobile operating-system requirements change over time, we recommend checking Celestron's current SkyPortal compatibility information before purchase.

Recommended Usage – Astronomy 

 

Includes These Celestron Technologies

Compatible With

• NexStar Evolution Manual
• Addendum for NexStar Evolution Telescopes
• NexStar Plus Hand Control Manual
• Celestron PWI Telescope Control Software Manual