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Your cart is empty. The Quattro Imaging Newtonian is one of the most affordable telescopes 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 knife-edge baffles to absorb any stray light from ruining your images.
As customary with all Sky-Watcher telescopes, a boat-load of accessories are bundled
with the optical tube. First is a 2-inch dual-speed 10:1 focuser with 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 finderscope. 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.
Scott K
Reviewed in the United States on October 10, 2021
If you are looking for a scope that is fast and has excellent optical performance, this is it. When paired with the SkyWatcher Quattro coma corrector it delivers a wonderfully corrected field across an APS-C sized sensor. I have pared mine with the ZWO ASI2600MM which gives an image scale of 0.647 arcsec/pixel, which is perfect for my local seeing conditions. It captures all the detail present in distant galaxies and it does it quickly given it's F4 speed.A few things to note if you are considering this scope:1) you need a seriously capable mount. With my camera train attached this scope weighs 60 lbs. An EQ6 or EQ6-R will not cut it, that is what the 200P or 250P is for.2) you need a quality set of collimation tools. I use the Farpoint 2" Super Collimation Kit3) there was significant tilt in the focuser on delivery. But the focuser has built in tilt adjustments to fix this4) as delivered the primary mirror was shifting in the cell which changed the collimation substantially as you pointed the scope in different directions. I fixed this by adding shims between the mirror retaining clips and the edge of the primary. Do not over tighten the clips as it will result in pinched optics.
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