80mm aperture, 640mm focal length (f/8). One of the best and most economical telescopes for land use in the SAXON range, though equally adaptable for astronomy. Both have sturdy equatorial mount systems, making very precise tracking possible with these controls. They can also take a motorised drive. The 640x80 also has a 6x30 viewfinder, two 1.25" eyepieces (9mm and 20mm) and aluminium tripod.
Optical Design : | Achromatic Refractor |
Lens Material : | |
Diameter : | 80mm |
Focal Length : | 640mm |
Scondary Mirror Diameter : | n/a |
F/ratio : | F/8 |
Highest Practical Power : | 180x |
Faintest Steller Magnitude : .5 | 12 |
Resoving Power : | 1.3 |
Finderscope : | 6x30 Finder |
Focuser diameter : | 1.25" |
Diagonal : | 90 degree Star Diagonal |
Eyepiece(s) : | 1.25" Super 25 and 10 |
Mount Type : | EQ |
Slow-motion Control : | Vertical & Horizontal |
Counterweight(s) : | 3.5Kgs |
Piggyback Bracket : | n/a |
Accessory Tray : | Wall-to-wall |
Ground Board Diameter : | n/a |
Ground Board Weight(s) : | n/a |
Motor Drive : | Optional |
Go-to : | n/a |
Tube Weight : | 2.00Kgs |
Tube Dimension(dia. x length) : | 9cm x 86.5cm |
Tripod Height : | 71-123cm |
Shipping Weight : | 12Kgs |
Shipping Carton Dimensions : | 90x 45 x 25 cm3 |