Brand: Sky-Watcher

Sky-Watcher Flextube 300P 12" Collapsible Dobsonian Telescope (S11740)

S11740

Brand: Sky-Watcher

Sky-Watcher Flextube 300P 12" Collapsible Dobsonian Telescope (S11740)

S11740

  • Large 300mm aperture delivers stunning viewing experience
  • Innovative collapsible design that retains collimation
  • 1840x more light-gathering power than the human eye
  • Patented tension control handle allows for precise slewing and maximum stability
  • Parabolic primary mirror with Radiant Aluminum Quartz (RAQ) coating for 94% light reflectivity
  • Heavy-duty rocker box with Teflon bearings provide a stable base with smooth motion
  • 2-inch Crayford-style focuser with 1.25-inch adapter allows for use of nearly any eyepiece
$2,320.00 CAD

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Product Description

For decades, the Dobsonian stood as a DIY staple of amateur astronomy, usually constructed with two mirrors, a tube and a base. Often referred to as '˜light buckets', Dobsonians provide users with the highest possible aperture for their money when compared to telescopes of a similar size, such as Schmidt-Cassegrains or refractors.

Developed in the 1970s, the Dobsonian-style telescope is an inexpensive solution for bright, detailed visual observing using a simple design. The name '˜Dobsonian' comes from the telescope's inventor, John Dobson, a Vedanta monk who popularized sidewalk astronomy, and dedicated his life to astronomy outreach. Dobson was well known for constructing large aperture reflecting telescopes capable of deep sky viewing, using low cost materials. These were often made with found materials, heavy cardboard tubes, recycled porthole glass, and plywood mounts. Dobson, who literally wrote the book on how and why to make amateur telescopes, encouraged other astronomers to assemble their own telescopes and taught workshops on telescope making.

The Flextube Dobsonian innovates on that original design, offering users the ability to collapse the optical tube using a proprietary truss-tube system while retaining its collimation. The optical tube uses a parabolic primary mirror, constructed of borosilicate, then polished and coated with our proprietary Radiant Aluminum Quartz (RAQ), producing a remarkable 94% reflectivity. With a 12-inch aperture, the Flextube 300P Dobsonian collects 1840 times more light than the human eye! This simple yet effective design is perfect for visual observation of faint objects, such as nebulae, star clusters, and galaxies.

Supporting the Flextube Dobsonian is more than just a simple rocker box. The base uses Teflon bearings for smooth, easy Azimuth slewing and a patented tension control handle to lock the telescope in place. Once locked on an object, the telescope can support both 1.25-inch eyepieces as well as the heavier 2-inch eyepieces, allowing you to use virtually any eyepiece on the market. All Flextube Dobsonians come with a slew of accessories, including: two 1.25-inch eyepieces, a 1.25-inch eyepiece adapter, a 2-inch eyepiece adapter, dust caps and a 8x50 finderscope.

At Sky-Watcher, we stay true to the traditional John Dobson design, while offering a fresh look for the 21st century. Although we love computerized telescopes, using a star chart to find objects by hand can be far more fulfilling and will improve your knowledge of the night sky. Unplug your electronic devices, step outside, and become immersed in the wonders of the universe.

What can I see with a Sky-Watcher Flextube 300P 12" Collapsible Dobsonian Telescope (S11740)?

Here are some simulated views of common objects. Results with your telescope will vary with viewing conditions, obrits, equipment and more.

Jupiter with

25mm Eyepiece - 60x Magnification

(Included with This Telescope)

Jupiter with

10mm Eyepiece - 150x Magnification

(Included with This Telescope)

Jupiter with

5mm Eyepiece - 300x Magnification

Sold Separately

Moon with 25mm Eyepiece

60x Magnification

(Included with This Telescope)

Moon with 10mm Eyepiece

150x Magnification

(Included with This Telescope)

Moon with 5mm Eyepiece

300x Magnification

Sold Separately

Andromeda with 36mm Eyepiece

42x Magnification

Sold Separately

Andromeda with 25mm Eyepiece

60x Magnification

(Included with This Telescope)

Andromeda with 10mm Eyepiece

150x Magnification

(Included with This Telescope)

What's in the Box

  • Optical tube assembly

Base

8x50 RACI finderscope

25mm eye piece

10mm eye piece

Specifications

Optical Info
Optical Design Newtonian
Mirror Coatings Radiant Aluminum Quartz (RAQ) coatings with 94% reflectivity
Glass Type Borosilicate
Primary Aperture (mm) 305
Primary Edge Thickness 38mm
F/Ratio 4.9
Focal Length (mm) 1500
Secondary Diameter 70mm
Secondary Obstruction (by diameter) 23%
Secondary Obstruction by Area 5%
Observational Info
Dawes Limit 0.38
Rayleigh Limit 0.46
Limiting Mag. 14.9
Minimum Magnification 43
Maximum Magnification 600
Light Gathering (compared to next size down) 44%
General Info
Focuser 2" Crayford
OTA Length (Retract/Ext.) 36"/55"
OTA Outer Diameter 14.25"
OTA Weight (with accessories) 46.2
Dob Base Weight 38.3
Dob Base Measurements 29"x25"
Zenith Eyepiece Height 55.5"
Accessories
Included Finder 8x50 RACI
Included Diagonal No
Included Eyepieces 25/10 Plossl
Magnification w/ Included Eyepieces 60x/150x
Included Case No
Corrector No

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