StellaLyra 16 Inch f4.5 Dobsonian

Product Description

With a huge 16 inch aperture, this impressive premium build quality Dobsonian telescope has the light grasp for serious visual astronomy! Definitely one for the deep-sky enthusiast. Designed and manufactured to a very high standard by Guan Sheng Optical (GSO) in Taiwan.

Viewing the lunar surface will feel like you can reach out and scratch plaster! Venus and its phases are also viewable. In good seeing conditions, you can observe Mars with surface shading and polar cap, Jupiter's weather bands and a number of its Moons and Saturn with its rings, including the Cassini division, are also clearly visible. So too, are many deep sky objects such as galaxies and nebulae. For many owners, this telescope will provide a lifetime of observing.

All StellaLyra Dobsonian telescopes are fitted with a quality GSO aluminised parabolic primary mirror with minimum 93% reflectivity and a silicon-dioxide protective overcoat to ensure the surface remains bright for years to come.

Collimation knobs on the primary mirror cell provide easy collimation adjustment, without tools, and an integrated fan provides fast cooling.

This 16" model also features an impressive CNC-machined 2" Crayford focuser with 1:10 dual-speed focus adjustment for smooth, precise focusing. And no image-shift!

The focuser includes a 2" to 1.25" adapter, so you use both 2" and 1.25" eyepieces and accessories. Brass compression rings grip them securely without marring their nosepiece. A convenient 35mm focus extender is also supplied so you can achieve focus easily when using most long focal length 2" eyepieces.

Two fully multicoated eyepieces (1.25" 9mm Plössl & 2" 30mm SuperView) are included so views will be clear and sharp from the outset.

The Dobsonian base is delivered flat-packed and is easy to assemble.

A robust roller-bearing assembly provides smooth, reliable azimuth adjustments. Metal plates above and below the bearings prevent them from sinking into the softer wood (no divots!), so the movement remains smooth, even after years of use.

For altitude adjustment, a robust steel shaft and CNC-machined metal plates with large knurled tension adjustment knobs, one on each side, provide smooth, precise movements and adjustable tension.

The mount also features a convenient balance adjustment mechanism with an engraved scale that enables the telescope to be moved forward or backward for precise balance. This is useful when changing from a small eyepiece to a large, heavy one or when adding a second finderscope or binoviewer.

For comfort and convenience, a Right-Angled Correct Image 8x50 finder scope is included, so no cricked neck!

Carbon Fibre Truss Tubes
Six carbon fibre truss poles arranged in a triangular formation form the main telescope tube joining the bottom primary mirror box to the top secondary cage.
The truss construction enables the telescope to fit in most cars and reduces the weight significantly vs solid tubes.
The 'open' arrangement allows for quicker temperature equilibrium of the mirrors for the best performance.
The CNC machined locking points and truss arrangement ensure robust and rigid construction that effectively holds collimation.

Primary Mirror Cell
Robust primary mirror cell holds collimation well.
Collimation is easily adjusted using oversize, easy-to-grip adjustment and locking knobs.
The primary mirror cooling fan helps draw air over the mirror for faster cooling. The fan can be powered using the supplied AA battery holder (batteries not included) or a separate 12v DC power supply with a centre positive 2.1mm/5.5mm DC jack.

Features
406mm (16") optical aperture
1829mm focal length
f/4.5 focal ratio
25% secondary mirror obstruction
Parabolic primary mirror with minimum 93% reflectivity
Aluminium and silicon dioxide (SiO2) protective mirror coatings
Sturdy primary mirror-cell with easy grip collimation knobs
Cooling fan brings the primary mirror to ambient temperature quickly for best performance
Six carbon fibre trusses for strength, rigidity and portability
4-vane, all-metal secondary Spider and adjustable primary cell
CNC-machined 2" dual-speed Crayford focuser with non-marring brass compression rings
2" to 1.25" adapter enables the use of both 2" and 1.25" eyepieces and accessories
35mm focus extension enables focus when using long focal length 2" eyepieces
Smooth, stable Dobsonian mount with tension adjustments, four slot eyepiece holder and side carry-handles
Supplied with fully multicoated 1.25" 9mm Plössl and 2" 30mm Superview eyepieces
8x50 Right-Angled Correct Image finderscope for comfort and convenience