Features

AT A GLANCE

• 8" / 203 mm Aperture
• 1200mm Focal Length
• f/5.9 Focal Ratio
• 2" Single-Speed Crayford Focuser
• 25mm and 10mm Super Eyepieces
• 9x50 Straight-View Finderscope
• Tension Control Handle
• Floor-Based Manual Alt-Az Mount
• Dual Axis Teflon Bearings
• Altitude Tension Clutch

DESCRIPTION

Sporting the large light bucket users have come to expect from a Dobsonian, the Sky-Watcher 8" f/5.9 Traditional Dobsonian Telescope gives users performance at a reasonable price. Its large parabolic primary mirror is highly reflective and corrects spherical aberration to eliminate distortion across the entire field of view, especially at the edges. The four-arm secondary mirror bracket is made with 0.5mm thick fine supports to reduce light loss and diffraction spikes.

The large 8" aperture draws in copious amounts of light to make detailed observations of the Moon and planets, and still reach out past our solar system to discover dim deep-sky subjects. Its f/5.9 focal ratio and Crayford focuser makes this an ideal choice for imaging. Its relatively fast focal ratio enables devices to capture images in less time than slower scopes, while the unique focusing mechanism employed in the Crayford-style gives it the ability to achieve tack-sharp focusing with zero back-lash that rack-and-pinion focusers generally are unable to. This 2" focuser will accept larger eyepieces so users can enjoy a truly immersive visual experience, and a 1.25" adapter is included to enable the use of the more common size eyepieces and accessories.

The heavy base weighs in at 25 pounds and provides a rock-steady platform with very low vibrations. This alt-az rocker mount features Teflon azimuth bearings and a tension clutch on altitude axis. Finally, the tension control handle allows users to adjust the settings allowing them to move the mount easily and smoothly by hand with minimal vibration and maintain its position when released.

Optical Performance

• 8" aperture
• f/5.9 focal ratio
• 1200mm focal length
• Efficient, highly reflective mirrors increase image brightness

Mount

• Alt-az rocker design
• Teflon azimuth bearings
• Teflon bearings and tension clutch on altitude axis
• Tension control handle allows for smoother rotation to reduce vibrations and limit over-compensation

Focuser

• Single-speed rack-and-pinion
• Accepts 2" eyepieces and accessories
• Crayford focusers use a toothless friction system that allows for super-fine precision focusing without backlash
• Includes a 2"-to-1.25" adapter

Eyepieces

• 1.25" diameter barrel
• 25mm yields 48x power
• 10mm yields 120x power

Finderscope

• 9x50
• Straight-through viewing

SPECIFICATIONS

Optical Design Newtonian Reflector
Aperture 203 mm / 8"
Focal Length 1200 mm
Focal Ratio f/5.9
Focuser Single-Speed Crayford
Eyepiece Barrel Diameter 1.25", 2"
Diagonal None
Finderscope Yes
Mounting System None
Mount Type Manual; Alt-Azimuth
Batteries None
GPS None
Wi-Fi None
Weight
20.0 lb / 9.1 kg (OTA)
25.0 lb / 11.3 kg (Mount)
45.0 lb / 20.4 kg (Fully Assembled)
Package Weight 61 lb
Box Dimensions (LxWxH) 49 x 26 x 17"