Sky-Watcher 203/1200 DOB 8" Pyrex telescope (Dob 8" Classic 200P) (Sky-Watcher, SKU: SW-1302) is a Newtonian reflector with a 203 mm aperture and a focal length of 1200 mm, mounted on a manually operated Dobsonian base. Its optical parameters make it suitable for visual observations of the Moon, planets, double stars, open and globular clusters, nebulae and brighter galaxies.
The 203 mm primary mirror collects more than 800 times as much light as the human eye. This aperture provides sufficient light-gathering power for observing numerous deep-sky objects while also allowing detailed views of the Moon and the planets of the Solar System.
The primary mirror is made of Pyrex borosilicate glass with a low coefficient of thermal expansion. This material limits changes in the shape of the mirror as the temperature changes, helping to maintain stable optical performance.
The optical tube is mounted on a stable Dobsonian base and is moved manually in altitude and azimuth. The telescope is equipped with a 2" Crayford focuser with a 1.25" adapter and T2 thread, as well as a 9 × 50 optical finderscope with crosshairs.
• Newtonian reflector with a 203 mm aperture
• parabolic primary mirror made of Pyrex glass
• 1200 mm focal length and f/5.9 focal ratio
• manually operated Dobsonian alt-azimuth mount
• 2" Crayford focuser with a 1.25" adapter and T2 thread
• 9 × 50 optical finderscope with crosshairs
• two 1.25" wide-angle eyepieces with a 70° field of view
• smartphone adapter
• Sky-Watcher 203/1200 mm optical tube
• Dobsonian mount
• adapter for 2" accessories
• adapter for 1.25" accessories
• 9 × 50 finderscope with crosshairs
• 20 mm Wide Angle 70° eyepiece providing 60× magnification
• 12.5 mm Wide Angle 70° eyepiece providing 96× magnification
• smartphone adapter
• optical dust caps
• optical system: Newtonian reflector
• primary mirror type: parabolic
• primary mirror diameter: 203 mm
• primary mirror material: Pyrex glass
• focal length: 1200 mm
• focal ratio: f/5.9
• mirror surface accuracy: λ/8
• minimum useful magnification: 29×
• maximum useful magnification: 400×
• focuser type: Crayford
• focuser diameter: 2"
• accessory compatibility: 2" and 1.25"
• photographic connection thread: T2
• finderscope: 9 × 50 with crosshairs
• mount type: Dobsonian alt-azimuth mount
• mount control: manual
• base diameter: 52 cm
• base height: 75 cm
• optical tube outer diameter: 23 cm
• optical tube inner diameter: 22 cm
• optical tube length: 110.5 cm
• eyepiece height with the tube horizontal: 83.5 cm
• eyepiece height with the tube at 45°: 111 cm
• eyepiece height with the tube vertical: 116.5 cm
• optical tube weight: 8 kg
• mount weight: 12 kg
• total weight: 20 kg
Moon
planets
star clusters
nebulae
aircraft
(complete Newtonian telescope mounted on a Dobsonian base)
(primary mirror – rear view)
(Crayford focuser and 9 × 50 finderscope)
(203 mm primary mirror, thin-vane spider and secondary mirror)
(adapter for 2" / 50.8 mm eyepieces)
(Dobsonian base with an accessory tray and carrying handle)
(Dobsonian mount – altitude movement is controlled using the tension handles on both sides of the optical tube; the photograph shows the 6" model)
(azimuth movement allows the telescope to rotate left and right on Teflon bearing pads; the photograph shows the 6" model)
• manufacturer's warranty period: 60 months
Never point the telescope at the Sun or look directly at the Sun without a certified, undamaged solar filter securely installed over the front of the optical tube. Direct observation of the Sun without appropriate protection can cause immediate and permanent eye damage.
The large aperture, stable Dobsonian mount and included wide-angle eyepieces make this telescope a practical instrument for visual lunar, planetary and deep-sky observations.
