Instructions / Assembly

SPECIFICATIONS
SPECIFICATIONS
54
Model and Product Number ETX 90 Observer Portable Observatory # 205004
Optical System
Optical Design Maksutov-Cassegrain
Primary Mirror Diameter 3.5” (90mm)
Primary Mirror Material Optical quality glass
Focal Length, Focal Ratio 1250mm, f/13.8
Optical Coatings Ultra-High Transmission Coatings (UHTC™)
Resolving Power (arc-seconds) 1.3 arc-seconds
Limiting Visual Stellar Magnitude 11.7
Viewnder Red Dot
Mount
Mount Type Dual Fork Alt-azimuth
Power 6 “AA” Cell Batteries or AC Adapter
Battery Life 20 hours
Tripod Adjustable-Height Steel Leg Tripod
with EQ tilt-plate
Electronics
Controller Hand Box AudioStar with 30,000 object database
Included Accessories
Eyepieces Super Plössl 26mm and 9.7mm - 1.25” size
Bubble Level/Compass Included - 1.25” size
Astronomy Software Included - for Windows OS
Weight
Telescope 9.5 lbs.
Tripod 9.75 lbs
Carry Case 10 lbs