Sky-Watcher 10” Quattro Imaging Newtonian Telescope # S11220

Our #: T-SW-S11220
Mfg #: S11220
Our Price: $1,180.00
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Quick Overview

  • 254mm aperture, 1000mm 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 250P imaging Newtonian 10" # S11220 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 is 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 imaging 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
  • True Aperture (mm): 257
  • Primary Aperture (mm): 254
  • F/Ratio: 4
  • Focal Length (mm): 1000
  • Secondary Diameter: 89mm
  • Secondary Obstruction (by diameter): 35%
  • Secondary Obstruction by Area: 12%

Observational Info:

  • Dawes Limit: 0.46
  • Rayleigh Limit: 0.55
  • Limiting Mag.: 14.5
  • Minimum Magnification: 36
  • Maximum Magnification: 500
  • Light Gathering (compared to next size down): 57%

General Info:

  • Focuser: 2" Dual Speed Crayford
  • OTA Length (Retract/Ext.): 36.5"
  • OTA Outer Diameter: 11.375"
  • OTA Weight (with accessories): 36.5
  • 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