150mm aperture, 600mm focal length
Fast f/4 focal ratio
Parabolic borosilicate mirrors utilizing Sky-Watcher's proprietary Radiant Aluminum Quartz (RAQ ) coatings designed for imaging with 94% reflectivity
11:1, dual-speed, 2-inch Crayford-style focuser
Oversized secondary mirror produces greater illumination for full-frame DSLR and CCD cameras
Primary and secondary mirrors are both collimatable
Included coma corrector is designed to match the 600mm focal length, ideal for APS-C sensors and smaller
Imaging focal ratio with included coma corrector/reducer is f/3.45, focal length is 518mm
Includes tube rings, mounting plate, eyepiece adapters, 70 Ultra Wide 22mm eyepiece, coma corrector/reducer, and a 6x30 finderscope
The Quattro imaging Newtonian is an affordable, 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.
Included with the Quattro Newtonian is a 11:1 dual-speed 2-inch Crayford-style focuser, 1.25 and 2-inch eyepiece adapters, a 6x30 finderscope, tube rings, V-style dovetail plate, a 70 Ultra Wide 22mm eyepiece, and coma corrector/reducer.
Soecifications
Optical Design: Newtonian
Mirror Coatings: Protected Aluminum coatings with 94% reflectivity
Glass Type: Borosilicate
Primary Aperture: 150mm
F/Ratio: 3.9
Focal Length: 600mm
Secondary Diameter: 64mm
Secondary Obstruction (by diameter): 42%
Secondary Obstruction by Area: 18%
Dawes Limit: 0.77
Rayleigh Limit: 0.93
Limiting Mag: 13.36
Minimum Magnification: 21x
Maximum Magnification: 295x
Light Gathering (compared to next size down): 40% (compared to 5" telescope)
Focuser: 2" Dual Speed Crayford
OTA Length (Retract/Ext.): 22"
OTA Outer Diameter: 7.25"
OTA Weight (with accessories): 5.70 kg
What's in the box
6x30 Finder
Mounting Rings/Dovetail
Included Eyepieces: 22mm 70 degree 1.25"
Coma Corrector: Yes
