ETX-80 ETX-80 with Backpack ETX-90 ETX-90 Portable Observatory
Product Number 0805-04-21 0805-04-20 3514-04-15 3514-04-20
Clear Aperature 80 mm (3.15") 90 mm (3.5 inches)
Optical Design Refractor Maksutov-Cassegrain
Focal Length 400mm 1250 mm
Focal Ratio f/5 f/13.8
Telescope Mounting Dual Fork Altazimuth Dual Fork Altazimuth
Optical Coatings Multi-Coated Ultra-High Transmission Coatings (UHTC™)
AutoStar Controller AutoStar #494 AutoStar #497
Object Database 1,400 object library 30,000 object library
Viewfinder None Red-Dot
Eyepiece Super Plössl 9.7mm and 26mm Super Plössl 26mm - 1.25" barrel Super Plössl 26mm and 9.7mm - 1.25" barrel
Tripod Field Tripod Light Weight Tripod Adjustable-height steel leg tripod
Batteries (User-Supplied) 6 AA Cell Batteries 6 AA Cell Batteries
Power Optional #546 AC Adapter Optional Meade Universal AC Power Adapter
Additional Features ETX-80 ETX-80 with Backpack ETX-90 ETX-90 Portable Observatory
AutoStar Suite Planetarium Software Included Included Included Included
Carry Case No No No Included
Tripod Bag Included Included
Erecting Prism Optional #933 Included Optional #932 Optional #932
Dew Shield No Included No No
Barlow Lens Internal Flip-in Barlow lens Optional #126 2x Short-Focus
Backpack No Included No No
Weights and Dimensions ETX-80 ETX-80 with Backpack ETX-90 ETX-90 Portable Observatory
OTA Dimensions 3.6" x 14.5" 3.6" x 14.5" 4.0" x 13" 4.0" x 13"
Telescope Weight 6.2 lbs. 6.2 lbs. 9.05 lbs. 9.05 lbs.
Tripod Weight 4 lbs. 3 lbs. 13.3 lbs. 13.3 lbs.
Carry Case Weight N/A N/A N/A 6.65