Telescope 80EDX EVOSTAR - Skywatcher
Sky-Watcher offers the EvoStar EDX range from 80 to 150mm to cover a wide range of needs. The EvoStar 80EDX is aimed at amateurs looking for a versatile instrument: both for observing planets AND for economically accessible deep sky photography. Thanks to its focal ratio of f/7.5, it allows the practice of astrophotography. Nebulae and galaxies will then be targets of choice. Its high optical quality, thanks to the good chromatic correction, will delight more than one amateur. The Moon, Jupiter and Saturn will always offer you a beautiful 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 80EDX, 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 80EDX 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 short focal length ratio, f/7.5, the Sky-Watcher EvoStar 80EDX refractor is particularly interesting for deep-sky photography. In combination, for example, with a large-format digital camera (corrector/reducer recommended), point the refractor at the most beautiful or complex deep-sky objects. In addition, such a diameter collects 78% more light than a 60mm refractor.
2.6" Crayford Dual Speed 10:1 Focuser
Sky-Watcher EvoStar 80EDX f/7.5 Apochromatic Refractor with Retracted Dew Shield
The Sky-Watcher EvoStar range features a high-quality focuser because to be consistent with the optics and deliver good results in astrophotography (where focus is paramount), the mechanics must be optimized. The focuser is a high-capacity Crayford focuser for larger sensors. With a 2.6" (68.5mm) 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 output rotates 360° without losing focus, helping you find the best framing.
To meet the requirements of amateur astronomers, the optical tube is made entirely of steel and machined with great precision under CNC (numerical control machine). No plastic parts are used! The solidity is therefore there as is the particularly successful aesthetics. The interior is blackened and baffled to limit the intrusion of stray light. Two collars and a Vixen-type dovetail are included for attachment to your mount.
Features
- Optical Design: Refractor with apochromatic doublet objective
- Effective Diameter: 80mm
- Focal Length: 600mm
- F/D Ratio: 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: 475mm (dew shield retracted) - 557mm (dew shield extended)
