Sky-Watcher 8” Quattro Imaging Newtonian Telescope # S11210
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Quick Overview
- 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
Product Details
The Sky-Watcher Quattro 200P imaging Newtonian 8" # S11210 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:
Optical Info:
- Optical Design: Newtonian
- Mirror Coatings: Radiant Aluminum Quartz (RAQ)™ coatings with 94% reflectivity
- 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
- Focuser draw tube thread: male M54x0.75 (after removing eyepiece holder)
Accessories:
- Included Finder: 9x50 Finder
- Included Diagonal: No
- Mounting Accessories: Rings/V-Rail
- Included Eyepieces: None
- Included Case: No
- Corrector: No (optional)
Other Information
- Country of Manufacture: China
