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Orion SKYQUEST XTG User Manual

Page 27

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SkyQuest XT12g

Primary mirror: 305mm diameter, parabolic, center-marked

Focal length: 1500mm

Focal ratio: f/4.9

Focuser: Dual-speed Crayford (11:1), accepts 2" and 1.25"
eyepieces

Optical tube material: Rolled steel

Azimuth bearing: Thrust needle bearing

Altitude bearing: Ball bearing

Eyepieces: 28mm DeepView, 2" barrel, 12.5mm Illuminated Plössl,
1.25" barrel

Eyepiece magnifications: 53x and 120x

Finder scope: EZ Finder II Reflex Sight

Eyepiece rack: Holds three 1.25" eyepieces and one 2" eyepiece

Mirror coatings: Enhanced aluminum with SiO

2

overcoat

Minor axis of secondary mirror: 70mm

Optical tube weight: 48.9 lbs.

Base weight: 52.9 lbs.

Tube length: 58"

Tube outer diameter: 14"

Motor drives: Dual-axis GoTo computerized, internally housed

Operation: Northern or Southern hemisphere

Power requirement: 12V DC 2.1 Amp (tip positive)

Motor type: DC servo with optical encoders for altitude and azimuth
axes

Slew speeds: Rate 0 = 1.0X
Rate 1 = 2X
Rate 2 = 16X
Rate 3 = 32X
Rate 4 = 50X
Rate 5 = 200X
Rate 6 = 400X
Rate 7 = 600X
Rate 8 = 800X
Rate 9 = 1000X

Tracking rates: Sidereal (default), Lunar, Solar.

Alignment method: Brightest Star, Two-Star

Database: Over 42,900 objects including:
Complete Messier & Caldwell catalogs, 7840 NGC objects, 5386
IC objects, 29523 SAO stars, 8 planets, moon, 212 named stars,
55 well-known double stars, 20 well-known variable stars, 25 user-
defined objects.