Sky-Watcher’s 90mm Maksutov-Cassegrain scope offers the same ultra-sharp views you’d get from a 90mm refractor, but without the size, weight, and price tag.
Versatility meets portability
The Maksutov-Cassegrain optical design is a favorite for both terrestrial and celestial use. Its correct image optics and high-contrast views make it ideal for use as a spotting scope. With 90mm of aperture, this telescope can easily go from observing deer at long range during the day to viewing the Moon and nebulae at night. But the Maksutov-Cassegrain truly excels when viewing or imaging the planets, thanks to its f/13.9 focal ratio.
Incredibly, the 90mm Mak-Cassegrain weighs in at under 4 lb. If you need to limit the size and weight of your telescope—whether you’re carrying it on an airplane or taking it camping—this is an excellent option.
About the Maksutov-Cassegrain
Although it’s not as widely known as the refractor or Newtonian reflector, the Maksutov-Cassegrain offers superb optical performance. Using a Maksutov corrector lens on the front of the optical tube and a series of mirrors, “Mak-Cass” telescopes correct for visual defects like chromatic aberration and coma. The result is bright images, pinpoint stars, and high contrast views at a fraction of the price of competing designs.
The 90mm Sky-Watcher Mak-Cass includes several high-quality accessories: a red dot finderscope to zero in on your target with ease, 25mm and 10mm 1.25” eyepieces, and a 1.25” star diagonal for more comfortable viewing. The scope is also equipped with a standard ¼-20” threaded bolt hole, so you can mount it on any photographic tripod.
Red dot finder, 1.25” 90 degree star diagonal, 25mm and 10mm Plossl eyepieces, black V-style dovetail plate
Dimensions & Specifications
Focal Length of Eyepiece 1
Focal Length of Eyepiece 2
Red dot finder
1.25” 90 degree star diagonal
Highest Useful Magnification
We stand behind all the products we sell, and your satisfaction is our top priority. If you're not satisfied with the quality of your purchase, simply send the item back to us in its original packaging within 30 days of its delivery.
Sky-Watcher USA warrants your telescope to be free from defects in materials and workmanship for two years. Sky-Watcher USA will repair or replace such product or part thereof which, upon inspection by Sky-Watcher USA, is found to be defective in materials or workmanship. As a condition to the obligation of Sky-Watcher USA to repair or replace such product, the product must be returned to Sky-Watcher USA together with proof-of-purchase satisfactory to Sky-Watcher USA.
The Proper Return Authorization Number must be obtained from Sky-Watcher USA in advance of return. Call Sky-Watcher USA at (310) 803-5953 to receive the number to be displayed on the outside of your shipping container.
Return & Exchange Policy
At our site, returns are easy! You may return new, unused, and resalable items for a refund or exchange. Simply ensure that the item is returned in its original product packaging within 30 days of delivery.