Skywatcher SkyLiner 250PX Dobsonian Telescope
Large Aperture Size and Ease of Use
The Sky-Watcher 10" Dobsonian Telescope SW880 254mm/1200mm (10") has a "paraboloidal" primary mirror to eliminate spherical aberration and a four-arm, secondary- mirror bracket with fine supports (0.5mm thick), to reduce diffraction spikes and light loss. In addition, this model include a 2" focuser with a 1.25" adapter, allowing the use of either eyepiece size. This model also include the new feature-tension control handle. Its large aperture size of 10 inches offers you a greater view of fainter celestial objects, greatly improving your viewing experience!
Pyrex Glass Optics
The Sky-Watcher 10” Dobsonian features a primary mirror made of Pyrex glass. Because of its very low coefficient of thermal expansion, Pyrex glass is less affected by changing temperatures. This greatly reduces the cooling time of a telescope larger than 8” in dameter without using an extra fan. The great stability of this low expansion glass ensures high quality images. It is also substantially more resistant to scratching then plate glass. Available on 254mm/120mm (10") only
WHAT is Dobsonian Telescope and WHY the Tension Control Handle?
A simple, elegant form of an alt-azimuth mount made to carry a Newtonian reflector was popularized by John Dobson in the late 1970's. The Dobsonian mounted telescope is popular among amateur astronomers and telescope makers because of its simplicity. In its simplest form, the Dobsonian mount consists of a box which allows the optical tube assembly to pivot in altitude, while the box itself is swiveled on a base in azimuth.
The Dobsonian mount usually relies on the friction between the side bearings on the optical tube of the telescope and a frictional material on the saddle to hold the optical tube in place. If there is too much friction, the telescope is difficult to move to center an object in the filed of view. If there is too little friction, the telescope will not sty where it is positioned. This makes stabilizing the optical tube of the telescope difficult when using a Dobsonian mount, especially when accessories, such as a finderscope or an eyepiece, are added to the optical tube. As long as the amount of friction is at an appropriate level, and therefore stabilization of the optical tube is achieved, the telescope can remain in its desired position to view an object and maintain its position even when the mount is rotated.
The devices for stabilizing a telescope on the Dobsonian mount currently available include: a sliceable weight to counter balance the weight of the telescope, a friction lock that must be adjusted to inhibit movement of the telescope, and a spring attached between the telescope tube and mount to aid in stabilization. These devices are inconvenient to use because they do not provide a simple and user-friendly way to adjust the friction.
The object of the Sky-Watcher Tension Control Handle invention (US Patent No. 6,940,642) is to provide a tension adjuster that users can easily turn to add or reduce tension, thereby increasing or decreasing the friction between the optical tube and the sideboard of the mount. By providing such a tension adjuster, the telescope does not need to be balanced in order to stay in position. The tension adjuster can be tightened such that the optical tube can stay in a position but can still be moved when prompted to adjust the position of the optical tube. Alternatively, the tension adjuster can be completely tightened to lock the optical tube in position.
In the Box:
*Please note, the image through all finder scopes will be upside down.
|Recommended Usage||Viewing Galaxies/Stars, Viewing Nebulae, Viewing the Moon, Viewing the Planets|
|User Level||For Intermediates|
I did a few solid days of research on telescopes on the net, Iceinspace is a very good start as are some others. Make sure you do your research on what scope is best for you.
There were cheaper 10 inch dobs around but given some of the good things said about Ozscopes customer service and helpful advice and info I received from Sarah over the phone I decided to go with Ozscopes.
The telescope itself was ordered on a Thursday and arrived in Darwin on Monday, awesome, shipping was Star track, was $200 but got it here fast and the day before the wifes birthday.
The Sky watcher 10 inch dob was easy to assemble, took me 45 mins taking my time and reading the instructions (at times), however I am fairly mechanically minded and good with assembly of "things" so if you are not then it may take you 60 to 90 mins.
The scope was very well packed and I inspected all items and components for damage and completeness, there were no problems there. The instructions were pretty simple and clear but could do with a little fine tuning so you don't have to re read and double check to be sure of what they were saying
Once assembled I aligned the spotter scope (daytime) on a distinct cloud in the distance, fairly simple and later proved to be accurate.
The next night, wifes birthday, we took the scope out into our front yard (normal suburban lighting), there were no clouds and the moon was about half.
I lined up the moon and using the supplied 25mm lens viewed and centered the moon, I then went straight to the 6mm that I bought with the scope and . . . WOW!!
Such amazing detail, we could see the craters and valleys so clearly, looking at the edge of the moon we could see the ripples and small height differences of lunar hills and craters, so amazing.
A helpful app for our iPad that we use to view the sky in great detail with awesome information is Night sky by iCandi apps. So helpful in finding stars, planets, the ISS and more.
Next was Jupiter, just rising above the neighbors house, this time with the 6mm and the 2 x lens I bought, OMG, WOW!! Could clearly see three bright moons of Jupiter and could make out the bands that run around the giant planet.
Jupiter is large in the scope at that magnification moves from view in around 25 seconds. It was not "crystal" clear but Jupiter was low in the sky and thus we were view through a lot of Earths atmosphere, hopefully it will be clearer with a later in the night viewing.
All up I am very happy, as is my wife, with the Sky watcher 10 inch dob Telescope, it is expensive at over $1200 with lenses and shipping but so worth the views that we can now see from our light polluted front yard, we will be heading out of town soon to get some clearer skys.
(Posted on Jan 08, 2014)
Pros: user friendly, quality +++
Cons: Size; it's not small. But that's because it's a Dob; it's expected
Pros: price, Accurate, user friendly, Positive adjustments, Cheap, quality +++, Beautifully crisp image!
Cons: May encourage you to buy a big telescope!, Size; it's not small. But that's because it's a Dob; it's expected
Your Skywatcher® product is warranted to be free of defects in materials and workmanship for FIVE year after the date of purchase. In the event of a defect under this warranty, we will, at our option, repair or replace the product, provided that you return the product with proof of the receipt.
This warranty does not cover damages caused by misuse, improper handling, installation, collimation or maintenance provided by someone other than a Skywatcher Authorized Service Department.
For Skywatcher Products purchased elsewhere, will NOT qualify for manufacturers warranty from us, it must be returned to the place of purchase to resolve any issues.
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