OTA Dual Speed ​​150/600 Black Diamond Telescope

• Perfect instrument for beginners and advanced players.
• Multipurpose planetary exploration and deep sky initiation.
• Includes Crayford focuser with 10:1 ratio (best sharpness adjustment)
• Designed for astrophotography with a resulting focal ratio of f/3.45
• Coma corrector/0.86x focal reducer included

For astrophotographers, in order to offer better performance in deep-sky imaging, Sky-Watcher has reduced the focal length of the "classic" Black Diamond af/4 range to offer a wider field and a significantly faster photographic speed (2 times between two instruments). at f/4 and f/5). For the same exposure time, a shorter focal length ratio allows for obtaining more signal or an equivalent signal by reducing the exposure time. In addition, the size of the tube is reduced, which also means less wind resistance.

Its Newtonian design offers several advantages over other instrument families (Cassegrain and refractors). Mirror manufacturing is cheaper for the same diameter and their focal ratio is generally very low. In this way you can benefit, for an attractive price, from a bright telescope that offers a very wide field of view (in this case f/D=4) . The central obstruction is also weaker than that of Cassegrain-type telescopes.

With a 150mm primary mirror, The Sky-Watcher Newton 150 gathers 73% more light than a 114mm telescope . Under a very dark sky, it is possible to see many objects in the sky that are barely distinguishable with instruments of smaller diameter. It promises beginners many discoveries . In planetary observation, you will reveal many details about Jupiter, Saturn, and the Moon using a Barlow lens or a short focal length eyepiece.

Unlike very cheaply made or small-diameter Newtonian telescopes, the Sky-Watchers Newtonian telescopes of 150, 200, 254 and 300 mm They have a parabolic primary mirror . The mirrors are polished spherically and then trimmed to achieve a parabolic shape (more expensive and difficult to obtain). This is an essential selection criterion for instruments larger than 130 mm and with a short f/D .

Focusing is achieved using a dual-flow Crayford eyepiece. It allows you to obtain a fine focus thanks to the 1:10 reduction . A very noticeable advantage during observations with high magnification and in taking images. Can support heavy loads (e.g., APN) . A 31.75 mm adapter is supplied as standard to use eyepieces of the same format from the 50.8 mm exit. An adjustment screw located at the bottom of the eyepiece holder allows you to maintain focus by following the orientation of the optical tube.

To minimize obstruction, the mounting bracket for the secondary (planar) mirror has four thin arms , each 0.5 mm wide. These arms are sufficiently rigid to limit diffraction peaks around bright stars and prevent excessive light loss. A 6x30 achromatic finder scope with its own mount is also included as standard.

Specs

Items delivered:

• 1 Sky-Watcher 150mm f/4 optical tube
• 1x 22mm 70° ultra-wide eyepiece (without protective caps)
• 1x straight finder 6x30
• 1x Corrector/Reducer 0.86x (M48)
• 1x Sky-Watcher 50.8mm Crayford focuser with microfocuser (dual speed 1:10) and 31.75mm adapter
• 2x fixing clamps
• 1x Vixen type integrated male dovetail
• 1x Piggyback mount for Kodak camera on top of one of the mounting collars