Refractor tube Skywatcher Evolux 62mm 2020mm focal length

Skywatcher Evolux refractor tube with a 62 mm objective aperture and a 2020 mm focal length provides a long focal ratio optical tube assembly intended for high-magnification visual observation and astrophotography. The slim, lightweight tube is built to be incorporated into modular amateur telescope systems and pairs with a range of compatible mounts, focusers and eyepieces. Its long focal length makes it appropriate for detailed views of the Moon and planets, as well as for splitting close double stars under steady seeing conditions.

Advantages

The refractor design delivers a well-corrected image across the field with minimal maintenance compared with more complex reflector systems. The 62 mm objective and long focal length produce a high effective focal ratio, which aids in reaching higher magnifications while keeping the optical train simple. The tube's mechanical interfaces are made for common amateur accessories, allowing straightforward mounting and interchangeability with different focusers, diagonals and eyepieces for both visual and imaging setups.

Suitable for

• High-magnification planetary and lunar observation
• Double-star observation and splitting tests
• Use as an optical tube assembly in modular amateur telescope setups
• Visual use with medium- to high-power eyepieces and barlow lenses

Key specifications

• Objective aperture: 62 mm
• Focal length: 2020 mm
• Optical design: refractor (achromatic/ED details as per manufacturer)
• Long focal ratio suitable for high magnification and fine detail
• Mechanical interfaces compatible with standard amateur focusers and mounts

How to use

Mount the Skywatcher Evolux tube on a stable equatorial or alt-azimuth mount rated for the tube's weight and balance. Attach an appropriate focuser, diagonal and eyepiece or camera adapter; balance the setup and perform coarse focusing on a bright target such as the Moon or a bright planet. For visual work, select eyepieces that provide the desired magnification while remaining within the mount's tracking capabilities. For astrophotography, use a suitable camera adapter and confirm rear-focus clearance before attempting imaging; minor adjustments to spacing may be required to reach focus with different camera sensors.

Usage recommendations

For best visual results, observe from a stable site with good seeing and allow the tube to reach ambient temperature to reduce tube currents. Use eyepieces and barlow lenses appropriate to the long focal length to avoid over-magnification beyond the atmospheric limit. When imaging, verify backfocus requirements and use a sturdy mount with tracking or guiding for longer exposures.