Manufactured with an aluminum fork mount dedicated specifically to its size and aperture, the ETX-105AT (Astro Telescope) moves effortlessly across the skies on ball bearing axes, in either manual or electronic modes. And, at a relatively modest increase in purchase price, the ETX-105AT yields 36% more light-collecting power than the ETX-90AT. The entire range of celestial objects... eight major planets, the Moon, galaxies, nebulae, star clusters... as well as terrestrial objects, may be observed with a significant, and immediately apparent, increase in resolution and image brightness. At the same time, the ETX-105AT maintains most of the compactness and ultraportability of the smaller-aperture ETX-90AT. As a compromise between the larger light-gathering capability of the ETX-125AT and the ultraportability of the ETX-90AT, the ETX-105AT is an excellent, and very popular, choice.

The ETX-AT's include an internal flip-mirror system for either straight-through or 90º observing, an aluminum fork mount with electric slow-motion controls, setting circles and locks on both axes, electronic control panel, a 4-speed (8x, 32x, 0.75°/sec, 5°/sec) dual-axis motor drive system with sidereal-rate tracking in equatorial mode, and an internal battery compartment accepting eight (user-supplied) AA-size batteries.

• Optical Design: Maksutov-Cassegrain

• Aperture: 105mm (4.13")

• Limiting Visual Magnitude: 12.1

• Focal Ratio: f/14

• Focal Length: 1470mm (57.87")

• Optical Tube Dimensions: 124mm (4.88") X 328mm (12.9")

• Secondary Obstruction: 1.32" (9.4%)

• Mount Type: Alt-Azimuth

• Drive System: GoTo, Dual-Axis

• Total Weight: 6.12 kg. (13.5 lbs), less tripod

• Optical Coatings: UHTC

• Batteries: 8 AA (user supplied)

• Tripod Weight: 5 kg. (11 lbs.)