Sky-Watcher BK 150/1200 OTAW achromatic refractor optical tube (Sky-Watcher). The Sky-Watcher BK 150/1200 OTAW is an achromatic refractor with a two-element objective measuring 150 mm in diameter and a focal length of 1200 mm. It is suitable for observing the Moon, planets and brighter deep-sky objects. The package includes observing accessories and tube mounting hardware; a mount and tripod are selected separately.
• two-element achromatic objective with an f/8 focal ratio
• focuser in the 2" standard and an adapter for using 1.25" eyepieces
• optical 9 × 50 finder with crosshairs for aiming the telescope at a target
• mirror star diagonal for more comfortable observation of objects high above the horizon
• tube rings and dovetail bar for attaching the tube to a suitable mount
• need to select a stable mount for the tube’s weight and length, particularly for imaging
• optical tube: Sky-Watcher BK 150/1200 OTAW
• eyepiece: 25 mm in the 1.25" standard
• eyepiece: 10 mm in the 1.25" standard
• finder: 9 × 50 with crosshairs
• mirror star diagonal: 2" with a 1.25" adapter
• tube rings
• dovetail bar
• optical design: achromatic doublet refractor
• objective diameter: 150 mm
• focal length: 1200 mm
• focal ratio: f/8
• maximum useful magnification: 300×, depending on observing conditions
• magnifications with the included eyepieces: 48× with 25 mm and 120× with 10 mm
• theoretical resolving power using the Dawes criterion: approximately 0.77"
• focuser standard: 2", with a 1.25" adapter
• tube weight stated in the specifications: 13 kg
• mount and tripod: not included
• warranty stated by the retailer: 5 years for mechanical components and 2 years for electronics
The refractor comes with two eyepieces and accessories for observing once the tube is attached to a suitable mount.
The package includes two 1.25" eyepieces: 25 mm and 10 mm. The mount and tripod shown in the photographs are not included.
