Telescope 120EDX EVOSTAR - SKYWATCHER

Sky-Watcher offers the EvoStar EDX range from 80 to 150mm to cover a wide range of needs. The EvoStar 120EDX is the brand's 2nd largest diameter ED refractor, it is aimed at amateurs looking for a versatile instrument: for both planetary AND deep sky observation! Thanks to its f/7.5 focal ratio, it allows the practice of astrophotography. Nebulae and galaxies will then be prime targets. Its high optical quality, thanks to good chromatic correction, will delight more than one amateur. The Moon, Jupiter and Saturn will offer you a striking spectacle, do not hesitate to use high magnification on such an instrument.

To achieve the coveted "APO" designation, 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 EvoStar 120EDX, a doublet composed of an ED glass element (from renowned Japanese manufacturer Hoya) reduces chromatic aberrations to significantly limit the appearance of colored rims on planets or the Moon. The use of multi-layer coatings on all surfaces significantly limits losses due to lens passage, making the EvoStar 120EDX brighter and more contrasty than conventional, less well-corrected refractors. The "Metallic High-Transmission" (MHC) coating is applied to the air-glass surfaces, ensuring stunning results (transmission close to 99.5%).

Thanks to its focal ratio (f/7.5), the Sky-Watcher EvoStar 120EDX refractor is particularly suitable for deep-sky photography. Combined with a large-format digital camera (corrector/reducer recommended), for example, you can aim the refractor at the most beautiful or complex deep-sky objects. Moreover, this diameter collects 44% more light than a 100mm refractor.

2.6" Crayford Dual Speed ​​10:1 focuser

The Sky-Watcher EvoStar range has a quality focuser because to be consistent with the optics and provide good results in astrophotography (where focusing is of prime importance) the mechanics must be optimized. The focuser is a Crayford with a high load capacity for the largest sensors. With a 2.6" (66mm) input format, it is both robust and precise thanks to a 10:1 gear ratio. A thumbscrew maintains focus depending on the orientation of the optical tube. The focuser exit rotates 360° without losing focus, helping you find the best framing.

To meet the demands of amateur astronomers, the optical tube is made entirely of steel and machined with great precision using a CNC (computer numerically controlled machine). No plastic parts are used! Its robustness is therefore guaranteed, as is its particularly attractive appearance. The interior is blackened and baffled to limit the intrusion of stray light. Two wide collars and a wide Losmandy-type dovetail are included for a secure attachment to your mount.

Features

• Optical Design: Refractor with apochromatic doublet objective
• Effective Diameter: 120mm
• Focal Length: 900mm
• Frame Ratio: F/D 7.5
• Focusing Device: 2.6" Dual Speed ​​Crayford with 1:10 Gear Ratio
• Rotating Focuser: Standard Dual Focuser - 2" (50.8mm) and 1.25" (31.75mm)
• Dew Shield: Retractable
• Optical Tube Length: 774mm (dew shield retracted) - 848mm (dew shield extended)