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Description

  • Fast f/4 optics: With a bright f/4 focal ratio, the Quattro Imaging Newtonian captures greater detail in a shorter exposure time.
  • 2-inch dual-speed crayford-style focuser: Never miss focus with this 2-inch dual-speed crayford style focuser.
  • Oversized secondary mirror: All Quattro Newtonians use an oversized secondary mirror capable of illuminating both APS-C and full-frame DSLRs without vignetting.
  • -edge baffles: Multiple -edge baffles minimize stray light from entering the optical tube and ruining your imaging or viewing experience.
  • Everything you need: While most manufacturers make you pay extra, Sky-Watcher gives you everything you need right out of the box, including: tube rings, a Vixen-style dovetail, and an 8x50 straight-through finder and bracket.
The Quattro Imaging Newtonian is one of the most affordable teles with a f/4 focal ratio. This astrograph is capable of producing an exposure 6x faster than any f/10 optical tube. Even pricey refractors have trouble reaching a focal ratio this fast. Using a faster optical tube will shorten the exposure time, giving you more time to photograph nebulae, clusters, and other deep sky objects. Like all Sky-Watcher reflectors, our Quattro Imaging Newtonian features aluminum-coated borosilicate mirrors with a quartz overcoat, producing 94% reflectivity. The optical system uses an oversized secondary mirror, providing greater illumination for DSLRs and CCDs using full-frame sensors. The optical tube is constructed with rolled steel, and features Sky-Watcher’s signature metal-flake Black Diamond finish on the exterior. The interior of the optical tube uses -edge baffles to absorb any stray light from ruining your images. As customary with all Sky-Watcher teles, a boat-load of accessories are bundled with the optical tube. First and foremost is a 2-inch dual-speed 10:1 focuser, and included 1.25-inch eyepiece adapter, which provides flexibility for either 1.25-inch or 2-inch eyepieces. Also included are tube rings and a V-style dovetail plate, as well as a 9x50 finder. For photographers looking to create a flat field and eliminate vignetting, an optional coma corrector is available separately. Parabolic mirrors normally produce some aberrations around the edge of the field of view (coma), so this corrector is highly recommended for users with large imaging sensors and full-frame DSLRs.

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Sky-Watcher Quattro 250P Imaging Newtonian - Large Aperture 10-inch Reflector Optical Tube for Astrophotography

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