Questar 3.5" Standard Telescope

For those living in extreme climates, Questar offers their exceptional 3.5" Maksutov with a Zerodur mirror. Zerodur's ultra-low coefficient of expansion virtually eliminates the need to refocus as the mirror cools and contracts in extremely cold temperatures. Broadband multicoatings and high reflectivity silver mirror coatings improve contrast and increase light transmission by 22% over standard aluminum mirrors. Its 89mm Maksutov optics (1300mm focal length f/14.6) routinely outresolve 8" Schmidt-Cassegrains on lunar and planetary detail. The all-metal equatorial fork mount has tabletop tripod legs, engraved setting circles, and manual slow motion controls with automatic clutches. An AC motor drive is standard. An optional battery operated DC drive is available. There's an all-season star chart on the self-storing dew shield and a Moon map on the scope barrel. Standard amenities include two premium $350 eyepieces, a built-in $350 Barlow, a thread-in glass solar filter, and a glass solar filter for the internal 4x right angle finder. A luggage-quality hard case holds all components and fits easily into an airliner's overhead luggage compartment. For the low temperature observer, there is no finer small telescope. Free shipping on this scope. Supplied Accessories: 1.25" 16mm and 24mm eyepieces (54x to 120x, depending on eyepiece and whether built-in 1.5x Barlow is used); built-in 4x finder (6x when 16mm eyepiece is used); VHR silver coated and overcoated Zerodur glass ceramic mirror; broadband dielectric multicoated optics; built-in star diagonal; dual arm fork mount; setting circles (r. a. circle power driven); sidereal rate AC motor drive (2.7 watts); manual slow motion controls; thread-in dust cap; 1.5" aperture off-axis solar filter; solar filter for finder; tabletop tripod legs; locking hard case; self-storing dewcap with embossed star chart; embossed Moon chart on scope barrel; ten-year warranty (two years on drive and focuser).