OTA Sky-Watcher 150ED Evostar Double Speed ​​DS Refractor Telescope (150/1200)

Description

All about the Sky-Watcher Evostar 150ED telescope

Sky-Watcher offers a new large diameter model: the EvoStar 150ED within its range of apochromatic glasses. It is the brand's largest diameter ED refractor, aimed at hobbyists looking for a versatile instrument: both for planet and deep sky observation! Thanks to its focal length ratio of f / 8 it allows the practice of astrophotography. nebulae and galaxies will be the main targets. Its high optical quality, thanks to the good chromatic correction, will delight more than one fan. The Moon, Jupiter and Saturn will offer you an impressive sight, do not hesitate to use a high magnification on this instrument.A 150mm telescope collects 2.25 times more light compared to a 100mm refractor

To obtain the valuable "APO" qualifier, a refractor must correct for primary and secondary chromatic aberrations inherent in all systems whose light rays pass through an optical element. In the case of the Sky-Watcher Evostar 150ED, a doublet composed of an ED glass element reduces chromatism to significantly limit the appearance of colored edges on the planets or the Moon. The ED glass chosen, FPL-53 (Schott), is the most capable of correcting these defects thanks to a very low dispersion

The use of multilayer treatments on all surfaces considerably limits losses due to lens passing, making the Evostar 150ED brighter and more contrasting than conventional refractors that are less corrected. The "Metallic High-Transmission" (MHC) treatment is applied to the air glass surfaces, which guarantees impressive results (transmission close to 99.5%). Thanks to its medium focal length ratio, f / 8, the Sky-Watcher Evostar 150ED is particularly interesting for deep sky and planetary photography.

10: 1 double speed focuser

Focusing is achieved through a 2 "(aluminum) Crayford focuser with a fine focus knob with 10: 1 reduction ratio, which provides the necessary force and precision when focusing. An adjusting screw maintains the focus depending on the optical orientation of the tube to be aligned with the objects and provide good results in astrophotography (where focus is essential).

To meet the requirements of amateur astronomers, the optical tube is made entirely of steel. Plastic parts are not used! The solidity is and the aesthetics are in tune. The interior is blackened and manufactured to limit stray light intrusion. A Kodak through screw is placed over one of the clamps to parallel adapt a camera.

Items delivered

1 Sky-Watcher black Diamond ED optical tube

2 rings

1 Vixen-type dovetail

1 Kodak camera overlay bracket on top of one of the mounting rings

1 Aluminium carring case