Neptune 664C - Planetary camera
Fits a 1.25-inch thread; adjust as needed depending on the installation.
CHF 272.64
CHF 219.00incl. Swiss VAT
Will be ordered for you
Timeframe: 10 days to 3 weeks
Estimated shipping: Between November 22 and 27, 2026
The Skywatcher Skymax-90 OTA is a Maksutov-Cassegrain optical tube designed to deliver high performance in an extremely compact format. Ideal for both novice astronomers and experienced observers looking for a portable instrument, it combines simplicity of use, optical quality and versatility.
Despite its small size, this telescope is capable of delivering detailed, high-contrast images, especially of bright objects in the night sky. This makes it an excellent choice for quick observations or impromptu sessions.
Featuring a 90 mm and a long focal length of 1250 mm (f/13.88), The Skymax-90T is specially optimized for high-magnification observations. Its Maksutov-Cassegrain design effectively corrects optical aberrations and delivers razor-sharp images.
The mirrors are treated Radiant™ Aluminum Quartz (RAQ™), offering up to 94 % reflectivity. This treatment improves brightness, contrast and durability, guaranteeing consistent performance over time.
This telescope is particularly recommended for :
Its maximum magnification of x180 allows you to take full advantage of its capabilities, while maintaining a stable, precise image.
One of the Skymax-90T's main assets is its compactness. Thanks to its closed design and long, folded focal length, it's easy to carry and store. It fits perfectly into a bag or travel kit.
This format makes it an ideal companion for :
Its robustness and ease of installation mean it can be set up quickly, even by novice users.
The Skymax-90 is not limited to astronomy. It can also be used for terrestrial observation, thanks to its excellent magnification and high contrast.
It comes with a universal smartphone adapter, for easy image capture:
Focusing by moving the primary mirror offers high precision and a wide adjustment range, ideal for both photography and visual observation.
The optical tube has a 45 mm dovetail, compatible with many frames on the market. It is also equipped with a thread for photo tripod, This allows rapid installation on standard brackets.
This dual compatibility makes the Skymax-90 extremely versatile and adaptable to different uses, from a simple photo tripod to a more advanced astronomical mount.
The Skymax-90 OTA comes with a complete set of accessories:
These accessories provide magnifications of x62.5 and x125, perfectly suited to planetary observations.
Thanks to its ease of use, compactness and optical performance, the Skymax-90 is a frequently used instrument. It requires no time-consuming preparations, and can be set up quickly to take advantage of observation as soon as conditions are right.
It's an excellent choice for users who want a telescope that's always ready to use, without compromising on image quality.
The Skywatcher Skymax-90 OTA is a compact, high-performance and extremely practical telescope. Ideal for planetary, lunar and nomadic observations, it offers excellent image quality in a small format, making it the perfect companion for all astronomy enthusiasts.
The Moon in great detail, the planets (Jupiter’s bands, Saturn’s rings, Venus’s phases), and double stars: its long focal length naturally provides high magnifications. For deep-sky observing, it is limited to the brightest clusters and objects. Its maximum useful magnification is approximately 180× (2 × the diameter in mm); in practice, atmospheric turbulence often forces observers to stay below this limit.
Two eyepieces are included: 25 mm and 10 mm. With a focal length of 1,250 mm, they provide 50× and 125× magnification. To calculate the magnification of an eyepiece, divide the telescope’s focal length by that of the eyepiece.
Yes, it's a lightweight instrument: the tube weighs about 1.4 kg.
No, practically never: a Maksutov's optics are factory-adjusted and remain stable, which is one of its major advantages for beginners. To check, a star test is all it takes: point the telescope at a bright star, defocus it slightly, and the rings should be perfectly concentric.
This tube is sold separately: its photographic capabilities depend on the mount you choose. With its long focal length (1250 mm), it is primarily designed for planetary and lunar video recording on a motorized mount. The tube weighs approximately 1.4 kg: keep this in mind when considering the mount’s load capacity.
90 mm Maksutov-Cassegrain telescope, red-dot finder, 1.25″ angled mirror, 10 mm and 25 mm eyepieces, smartphone adapter.
Here are a few accessories we've selected for this model, depending on your needs.
Fits a 1.25-inch thread; adjust as needed depending on the installation.
1.25-inch filter for the camera; check the thread on the mount.
Optional, but particularly useful when the planet is low in the sky; check the setup and focus.
