Sky-Watcher Quattro 8S 205/800 f/4 Imaging Newtonian OTA

Sky-Watcher Quattro 8S 205/800 f/4 Imaging Newtonian OTA – Product description

Sky-Watcher Quattro 8S 205/800 f/4 Imaging Newtonian OTA belongs to the OTA - optical tube range. 205/800 mm imaging Newtonian with fast f/4 optics, Pyrex primary mirror and 2-inch Linear Power focuser with 10:1 fine focus.

Key product details

• Deep-sky astrophotographers
• Wide-field imaging of nebulae and groups of galaxies
• Visual observers who also want a fast 8-inch Newtonian
• 205 mm aperture and 800 mm focal length
• f/4 focal ratio
• Parabolic Pyrex primary mirror

Product overview

The Quattro 8S is a fast 8-inch imaging Newtonian for deep-sky photography. Its 800 mm focal length and f/4 focal ratio provide a relatively wide field and short exposure times.

Suitable applications

• Deep-sky astrophotographers
• Wide-field imaging of nebulae and groups of galaxies
• Visual observers who also want a fast 8-inch Newtonian

Included equipment

• 205 mm aperture and 800 mm focal length
• f/4 focal ratio
• Parabolic Pyrex primary mirror
• 2-inch Linear Power focuser with 10:1 fine focus
• Tube rings and mounting rail
• Optical tube weight approx. 9.4 kg

Imaging requirements

At f/4, accurate collimation is particularly important. For larger sensors, a high-quality coma corrector is effectively part of the imaging system.

Practical note

Plan the coma corrector and backfocus together with the camera and adapters. At f/4, even a few millimetres of spacing can make a visible difference.

Selection note

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