The 6" f/4 Quattro Imaging Newtonian Telescope from Sky-Watcher
is a large-aperture astrograph, ideal for users searching for a
fast-imaging system that will work for both astrophotography and visual
astronomy. Boasting a swift f/4 focal ratio, this astrograph can produce
an exposure 6x faster than the average 8-inch f/10 Schmidt Cassegrain
telescope (or 8.4x faster with the included coma corrector/reducer).
Although designed as an imaging optical tube, these Newtonians also
produce bright and detailed viewing for visual astronomy.
Like all Sky-Watcher reflectors, the Quattro Imaging Newtonian features
borosilicate mirrors coated with Sky-Watcher's proprietary Radiant
Aluminum Quartz (RAQ) coatings, producing 94% reflectivity. The tube is
constructed with rolled steel, then coated with Sky-Watcher's signature
glossy metal-flake Black Diamond finish. The OTA uses an oversized
secondary mirror providing greater illumination for DSLRs and CCDs using
full-frame sensors, and an included coma corrector/reducer for those
who want to take their imaging to the next level.
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