Quattro 200P Imaging Newtonian

Description 205mm aperture, 800mm focal length Fast f/4 focal ratio Parabolic mirror designed for imaging with 94% reflectivity 10:1, dual-speed, 2-inch Crayford-style focuser Oversized secondary mirror produces greater illumination for full-frame DSLR and CCD cameras Tube rings, mounting plate, eyepiece adapters, and 9x50 finderscope included 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. 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™), 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 optional coma corrector is available for those who want to take their imaging to the next level. Included with the Quattro Newtonian is a 10:1 dual-speed 2-inch Crayford-style focuser, 1.25 and 2-inch eyepiece adapters, a 9x50 finderscope, tube rings, and a V-style dovetail plate. Specifications SKU S11210 UPC 050234112109 Optical Info Optical Design Newtonian Mirror Coatings 94% Aluminum Glass Type Borosilicate Primary Aperture (mm) 203 F/Ratio 4 Focal Length (mm) 800 Secondary Diameter 70mm Secondary Obstruction (by diameter) 34% Secondary Obstruction by Area 12% Observational Info Dawes Limit 0.57 Rayleigh Limit 0.69 Limiting Mag. 14 Minimum Magnification 29 Maximum Magnification 400 Light Gathering (compared to next size down) 78% General Info Focuser 2" Dual Speed Crayford OTA Length (Retract/Ext.) 28" OTA Outer Diameter 9.375" OTA Weight (with accessories) 21 Accessories Included Finder 9x50 Finder Included Diagonal No Mounting Accessories Rings/V-Rail Included Eyepieces None Included Case No Corrector No (optional)