The Sky-Watcher SW 120 ED EQ5 PRO High Performance Refractor Telescope S11620 provides the finest images that are possible to capture. Views of dramatic coal-back skies and contrast-rich views of planetary and deep-space phenomenon are also possible with this Sky Watcher Refractor Telescope.

The refractors of the telescope by Sky Watcher will always display sharper images than other optical designs because the refractor concentrates more light into the central airy-disk and first diffraction rings. There is no diffraction pattern interference caused by a diagonal mirror, or secondary mirror being suspended in the optical path (central obstruction) as is the case with reflector telescopes. Sky Watcher refractor telescopes are the logical choice as an investment in advanced instrumentation for exceptional viewing or photography.

Sky Watcher's SW 120 ED PRO Refractor Telescope design assures virtual elimination of secondary, residual "false color" normally present in 2-element achromatic lens designs using Crown and Flint glass. Sky-Watcher APO refractors utilize a second lens element made from the mineral fluorite instead of Flint glass. Fluorite is a halide with unique properties and a hardness of only four. It is an exotic and difficult material to make into a lens, which is why the cost of manufacturing a fluorite lens is higher compared to a Flint lens element. First, it has superior dispersion characteristics compared to pure silica-based glass. It functions as a high-index lens with very low dispersion. We use the term ED to signify "Extra-low Dispersion". Fluorite also corrects well for spherical aberration. Sky-Watcher utilizes only the very finest available fluorite lens, FPL-53.

The objective lens cell of the the Sky Watcher SW 120 ED PRO Refractor Telescope S11620 is light baffled to reject stray, unfocused light. The draw tube is likewise baffled to insure optimum contrast. The tube's interior is flat blackened to help prevent unfocused internal light reflections from reaching the focal plane. The optical tube is aluminum, powder-coated reflective gloss black with gold accent. The front and back cells are cast-aluminum painted black. Optical focus is achieved by means of a mechanically ultra smooth, backlash-free, precision 2 inch Crayford and pinion focuser assembly which includes course and focusing controls.

The additional aperture provides a dramatic increase in resolution and a heightened sense of seeing lunar and planetary surface phenomenon in seemingly 3D high-definition. Some of the great things that can be seen on the refractor telescope by Sky Watcher are the Southern Highlands of the lunar surface of the moon, Southeast of the famous crater Theophilus, the grand canyon of Mars and many more other areas into deep space.

Specifications for Sky-Watcher SW 120ED EQ5 PRO High Performance Refractor Telescope S11620:

Shipping Weight:		98 lbs.
Optical Design:		ED-APO refractor
Lens Material:		Crown front element; Fluorite 2nd lens
Aperture (Diameter):		120 mm
Focal Length:		1000 mm
F-Ratio:		F/8.3
Secondary Mirror Diameter:		N/A
Highest Practical Power:		240x
Faintest Stellar Magnitude:		12.8
Resolving Power:		.96 arc sec
Finderscope:		8x50 RA Viewfinder
Focuser Diameter:		2"
Diagonal:		2" Di-electric, 1.25" adapter
Eyepiece(s):		1.25" Super Plossl 32mm and 10mm
Mount Type:		Equatorial
Slow-Motion Control:		Computer micro-slewing
Counterweight(s):		2 x 11 lbs
Piggyback Bracket:		Standard
Accessory Tray:		Standard
Ground Board Diameter:		N/A
Ground Board Weight(s):		N/A
Motor Drive:		Micro-step stepper
Go-To:		SynScan
Tube Weight:		9lbs
Tube Dimension (dia. x length):		40.5" long
Tripod Height:		34" to 48"
Number of Packages:		2

• Produces sharp and high quality imaging
• Design assures virtual elimination of secondary, residual "false color" normally present in 2-element achromatic lens designs using Crown and Flint glass
• The Refractors utilize a second lens element made from the mineral fluorite
• The objective lens cell is light-baffled to reject stray, unfocused light

• Sky Watcher Sw 120 ED EQ5 PRO High Performance Telescope S11620
• Super Plossl 32mm and 10mm 1.25