Sky-Watcher Skymax 102
- 102mm Maksutov-Cassegrain Optical Tube
- 1300mm Focal Length
- f/12.7 Focal Ratio
- 94% Reflectivity RAQ™ Mirror Coatings
- Weighs Only 4.6 lbs
The Sky-Watcher Skymax 102 delivers high-contrast planetary and lunar views using its 102mm aperture and long 1300mm focal length. Its f/12.7 focal ratio is optimized for high magnification, resolving details down to the 1.14 arc-second Dawes limit. The entire optical tube weighs just 4.6 lbs and measures 12.25 inches long, making it an exceptionally portable instrument for detailed solar system observation.
The Maksutov-Cassegrain design packs a 1300mm focal length into a compact optical tube, providing the high power necessary to resolve fine details on planets. This long focal length, combined with the included 10mm eyepiece, yields 130x magnification straight out of the box, ideal for studying Jupiter's cloud bands, Saturn's rings, and the cratered surface of the Moon.
The Skymax 102 uses primary and secondary mirrors made from borosilicate glass, coated with Sky-Watcher's Radiant™ Aluminum Quartz™ (RAQ™) coatings for 94% reflectivity. The meniscus corrector lens is fully multi-coated to maximize light transmission and reduce chromatic aberration. This optical system features a small secondary obstruction of only 30% by diameter, which protects image contrast compared to other catadioptric designs, rendering deep black skies around bright targets.
Weighing only 4.6 lbs and fitting into the included soft case, the Skymax 102 is an ideal travel telescope or a convenient option for quick backyard sessions. It mounts easily to virtually any light-duty photo tripod or astronomical mount via its integrated V-style dovetail rail. This portability makes it a practical choice for observers who need a powerful telescope without the bulk of a large refractor or Newtonian.
The Skymax 102 arrives ready for observation with a full set of essential accessories. You get two wide-angle 1.25" eyepieces, a 25mm for wide-field locating (52x) and a 10mm for high-power views (130x). Also included are a red dot finder for easy aiming and a 1.25" star diagonal for comfortable viewing angles.
The Sky-Watcher Skymax 102 excels at high-magnification views of solar system objects. You can expect to see detailed craters and mountains on the Moon, the phases of Venus, the polar ice caps on Mars, Jupiter's main cloud belts and its four Galilean moons, and the rings of Saturn. Brighter deep-sky objects like the Orion Nebula (M42) and the Hercules Cluster (M13) are also visible.
The 1300mm focal length is a major advantage for viewing Jupiter. Using the included 10mm eyepiece for 130x magnification, you will clearly resolve the two main equatorial belts. Under steady seeing conditions, you can push the magnification towards its 201x maximum with an optional shorter focal length eyepiece or Barlow lens to see more subtle cloud bands and potentially the Great Red Spot.
While optimized for planets, the Skymax 102 can view many deep-sky objects. Its high-contrast optics make it excellent for splitting double stars and observing compact targets like planetary nebulae and globular clusters. However, its f/12.7 focal ratio results in a narrow field of view, making it less suitable for very large nebulae or open clusters that require a wider perspective.
With an OTA weight of only 4.6 lbs, the Skymax 102 is very lightweight and versatile. It can be used on a sturdy photographic tripod for casual viewing or on a light-duty astronomical mount like a Sky-Watcher AZ-GTi or Star Adventurer GTi for more serious observing and tracking.
The main advantage is its compact size. A 102mm refractor with a 1300mm focal length would be over four feet long and difficult to manage. The Skymax 102 provides the same focal length in a 12.25-inch tube, making it far more portable and easier to mount. It also offers this performance without the chromatic aberration (false color) that can affect achromatic refractors.
Yes, it's an excellent choice. The Maksutov design holds its collimation well, making it very low-maintenance. The long focal length makes it easy to achieve high power for exciting planetary views, and the included accessories provide everything needed to start observing right away.
| Optical Design | Maksutov-Cassegrain |
| Primary Aperture | 102mm |
| Focal Length | 1300mm |
| Focal Ratio | f/12.7 |
| Mirror Coatings | Radiant Aluminum Quartz (RAQ)™ coatings with 94% reflectivity |
| Lens Coatings | Fully Multi-Coated |
| Glass Type | BK7 / Borosilicate |
| Secondary Obstruction (by diameter) | 30% |
| Secondary Obstruction (by area) | 9% |
| Light Gathering | 28% more than 90mm model |
| Dawes Limit | 1.14 arc-seconds |
| Rayleigh Limit | 1.37 arc-seconds |
| Limiting Magnitude | 12.5 |
| Maximum Magnification | 201x |
| Minimum Magnification | 14x |
| Focuser | Primary Mirror Focusing |
| OTA Length | 12.25" |
| OTA Diameter | 4.625" |
| OTA Weight (with accessories) | 4.6 lbs |
| Included Eyepieces | 25mm & 10mm Wide Angle (1.25") |
| Magnification (with included eyepieces) | 52x / 130x |
| Included Diagonal | 1.25" Star Diagonal |
| Included Finder | Red Dot Finder |
| Mounting | V-style Dovetail Rail |
| UPC | 050234115100 |
Skymax 102mm Maksutov-Cassegrain OTA
× 1
25mm Wide Angle Eyepiece (1.25")
× 1
10mm Wide Angle Eyepiece (1.25")
× 1
1.25" Star Diagonal
× 1
Red Dot Finder
× 1
V-style Dovetail Rail
(pre-installed)
Soft Carrying Case
× 1