Highlights Maksutov-Cassegrain optical design Primary and secondary mirrors feature proprietary Radiant™ Aluminum Quartz™ (RAQ™) coatings Corrector plate featuring Metallic High-Transmission Coatings™ (MHTC™) virtually eliminates chromatic aberrations 127mm aperture, 1540mm focal length, f/12.1 focal ratio Aluminum tube coated with glossy, black diamond metal-flake finish Included accessories: a 2-inch 28mm eyepiece, a 6x30 finder scope, V-style dovetail, and a 2-inch diagonal. The Sky-Watcher Skymax Maksutov-Cassegrains are the ultimate take-anywhere telescopes. Despite their small dimensions they pack a powerful punch. Their high-resolution, diffraction-limited optical systems are multi-coated to maximize contrast and image sharpness. Note: This is the optical tube only and requires a mount or tripod. It does not include a 2" to 1.25" eyepiece adapter. If required, an Antares MDA is a good choice. The back of the scope has male SCT threads. Specifications SKU S11520 UPC 050234115209 Optical Info Optical Design Mak-Cass Mirror Coatings 94% Aluminum Lens Coatings Fully Multi-Coated Glass Type BK7/Borosilicate Primary Aperture (mm) 127 F/Ratio 12.1 Focal Length (mm) 1540 Secondary Diameter 39mm Secondary Obstruction (by diameter) 31% Secondary Obstruction by Area 9% Observational Info Dawes Limit 0.91 Rayleigh Limit 1.1 Limiting Mag. 13 Minimum Magnification 18 Maximum Magnification 250 Light Gathering (compared to next size down) 55% General Info Focuser Primary Mirror OTA Length (Retract/Ext.) 15" OTA Outer Diameter 5.75" OTA Weight (with accessories) 9.7 Accessories Included Finder 6x30 Finder Included Diagonal 2" Star Diagonal Mounting Accessories V-Rail Included Eyepieces 28 LET Magnification w/ Included Eyepieces 55x Included Case No Corrector No Shipping Weights & Dimensions
