Sky-Watcher 8″ Collapsible Dobsonian Telescope


Sky-Watcher 8" Collapsible Dobsonian Telescope


In response to the trending aperture fever in amateur astronomy for several years now, 8-inch diameter telescopes are now generally considered as the minimum entry-level aperture for serious night sky observations. One of these instruments that are recently introduced today is the Sky-Watcher 8" Collapsible Dobsonian Telescope, which is an ideal dedicated telescope for wide-field viewing of deep-space objects, such as galaxies, star clusters and nebulae. With low power, this instrument can dramatically capture wide swaths of the sky in one view. Let us dig deeper into this telescope.


Reviewing The Features


If you have experienced observing the sky through a high-quality, wide-field Dobsonian, then the Sky-Watcher 8" will take you for a great experience in amateur astronomy with its excellent features. The instrument will allow you to easily find your target, where you just have to swing it to the quadrant of the sky that you want to search and then scan the vicinity. It sports an 8 x 50 millimeter right-angle optical viewfinder that offers light gathering and magnification to help narrow your search for elusive celestial objects when star-hopping. It also includes the backlash-free 2-inch Crayford Focuser, which ensures ultra-smooth focusing adjustments and the multi-coated, 4-element Plossl eyepieces, which provide a spacious 52-degree apparent field of view.


The polishing process for its diagonal and primary mirror produces smooth mirror surfaces that ensures good contrast, as well as properly corrected optics that shows minimum alterations to the optical wave front. On each elliptical diagonal and primary mirror aluminum component, there is vacuum deposited to the front glass surface and over-coated with hard quartz, as well as additional layers of titanium dioxide.


All in all, the Sky-Watcher 8" DOB features Newtonian (parabolic) optical design; 200mm aperture; grade A annealed glass lens material; 1200mm focal length; 47mm secondary mirror; f/6 focal ratio; 406x highest practical power; .96 arc sec resolving power; 14.2 faintest stellar magnitude; 8×50 RA viewfinder finderscope; internal diagonal; 2-inch focuser diameter with 1.25-inch adapter; Dobsonian mount type; 25mm and 10mm 1.25-inch Plossl eyepieces; manual slow-motion control with tension adjustments; 11.5kg ground board weights; and standard accessory tray.



Pros and Cons


The collapse feature of the Sky-Watcher is pretty straightforward, where you just have to loosen three knobs, pull it up, snap into place and then tighten the knobs, not to mention that it is easy to collimate. Well-made, the instrument comes with great quality and offers smooth movements with its tensioning knobs and handles. Moreover, it is highly transportable when disassembled, as it can fit into any car.


However, this telescope is not without its own set of drawbacks. For one, it would pose some difficulties in its right-angle corrected view-finder, which would need replacement or supplementation. It can also be heavy, so you need to move it in parts. Aside from these, its multiple eyepiece holder would make it difficult for you to move its base.




All in all, the Sky-Watcher 8" Collapsible Dobsonian Telescope is an excellent instrument for its price. It offers great value and is a good investment to make, especially for those who are just starting in astronomy and star-hopping.

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