Optical Design: | Advanced Coma Free |
Diameter Primary Mirror: | 14.57" (370 mm) |
Corrector Plate Ø (Clear Aperture): | 14" (355 mm) |
Secondary Mirror Ø / Obstruction %: | 5.08" (129 mm) / 36.4% |
Focal Length, Focal Ratio: | 2845 mm, f/8 |
Resolving Power in arc seconds: | 0.33 |
Optical Coatings: | UHTC |
Focusing: | internal, Crayford style, with dual speed transmission |
Limiting Visual Stellar Magnitude (approx.): | 15.4 mag |
Optical Tube Dimensions (Ø x length): | 15.75" x 27" (40 cm x 68,5 cm) |
Tube Body: | Aluminum |
Primary Mirror: | low expansion borosilicate glass |
Secondary Mirror: | low expansion borosilicate glass |
Front Lens / Correcting Plate: | Schott Borofloat glass |
Recommended maximum magnification: | 710x |
Eyepiece(s) included: | 26 mm SPL eyepiece |
Eyepiece mount diameter: | 31.7 mm (1.25") via star diagonal (2" optional) |
Finder scope: | 8x50 mm |
Mount: | Double fork mount "Heavy Duty", separable fork |
Power supply: | 12 V; batteries or AC adapter |
Batteries (not included): | 8x C cells (LR14) |
Battery life (approx.): | 20 hrs. |
Drive system in RA/AZ: | 12V= servo motor, microprocessor controlled, 146 mm LX worm gear with Smart-Drive; brass worm shaft |
Drive system in DEC/EL: | 12V= servo motor, microprocessor controlled, 146 mm LX worm gear with Smart-Drive; brass worm shaft |
Fine motions: | Manual and electric, 185 speeds in both axes |
Autostar handheld computer: | Type AS-II |
Autostar objects database: | 145,000 objects |
Automatic alignment (GPS): | 16 channel GPS receiver, electron. "True Level" and "True North" sensors with magnetic declination compensation |
GoTo positioning accuracy (approx.): | 2 arc minutes |
Positioning accuracy, high precision mode: | 1 arcminute |
Drive speeds: | 0.01x to 1.0x sidereal, selectable in 0.01x increments; 2x, 8x, 16x, 64x and 128x sidereal speeds; 1°/sec to 8°/sec, selectable in 0.1° increments |
Tracking speeds: | Sidereal, lunar or user-defined selection from 2000 variable steps |
Bearings in Azimuth / RA: | 1x 102 mm and 1x 57 mm ball bearing |
Bearings in Elevation / DEC: | 47 mm ball bearings |
Tube material: | Aluminum |
Primary mirror: | Borosilicate glass with low thermal expansion |
Secondary mirror: | Borosilicate glass with low thermal expansion, individually adapted to the primary mirror |
Front lens or correction plate: | Schott Borofloat, aspherical |
Tripod: | "Giant" field tripod; 22.7 kg |
Shipping weight (incl. tripod): | 108.4 kg |
Field tripod height: | 102 cm - 127 cm, variable |
Accessories: | StarLock tracking system with 2 cameras (25/26 mm wide field optics f/1.04, field 14.72x11.78° and 80/400 mm f/5, 57.2x45.8 arcminutes) |
Focusing drive(s): | Shifting-free, internal Crayford-style focusing system with 1/7 gear reduction |