Home > Astronomical Telescopes > Skywatcher > Dobsonian Series
Model: 10158Brand: SkywatcherDesign: ReflectorSize: 12" (305mm)Computerized: ManualLevel: IntermediateMount Type: Dobsonian
Delivery: Courier Delivery
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305mm (12") F/1500 Parabolic Truss-Tube Dobsonian
"A precision instrument that breaks the stereotypical Dobsonian mold to deliver stunning planetary and deep-sky performance in a compact, readily transportable package.""The upper section of the FlexTube containing the secondary mirror assembly and Crayford focuser extends with effortless precision on three rods that are easily locked into position at their greatest extent. Despite repeatedly collapsing and extending the instrument in the course of an prolonged observing session, the FlexTube's optics remained in perfect alignment.""It would be easy to pigeonhole the 305mm FlexTube as an innovative, transportable Dobsonian for the deep-sky enthusiast, but it's much more than that. Its stunning planetary prowess will have many observers redefining what short focal ratio Newtonians are capable of.""Having used a wide range of Sky-Watcher Newtonians over the years, I've often expressed my pleasure at the the consistency and precision with which the mirrors are polished and figured. In my Astronomy Now review of this instrument's predecessor, the Skyliner-300P, I wrote of its enviable optical performance for the price. I didn't think the 305mm FlexTube would surpass it, but it does.""Saturn is often described as the jewel of the Solar System, but to see it in all its 24-carat splendour you need a 12-inch FlexTube. In recent memory I haven't seen such a sharp and richly rendered image of the ringed planet as that delivered by the 305mm FlexTube on the night of April 8th, 2008.""I was able to use the 305mm FlexTube on a wide variety of celestial objects under what passed for fine observing conditions from my heavily light-polluted suburban locale. Messier 3, the stunning globular cluster in Canes Venatici, was resolved into a ball of innumerable stars, some held with direct vision right across the core. Messier 82, the starburst galaxy in Ursa Major, easily revealed mottled dusty filaments across its nucleus. Edge-on galaxy NGC 4565 in Coma Berenices showed the dust lane along its slender form. And so the list went on.""Mars, just 6.6 arcseconds in diameter, revealed its 90% gibbous phase with ease. But what surprised me was plainly identifying the Syrtis Major near the planet's meridian at such a distance from Earth."Ade Ashford, www.scopetest.com
Magnifications (with Eyepieces supplied): x60 & x150Highest Practical Power (Potential): x600Diameter of Primary Mirror: 305mmTelescope Focal Length: 1500mm (f/5)Eyepieces Supplied (1.25"): SP10mm & SP25mmDual-Fit 1.25"/2" Crayford FocuserParabolic Primary Mirror0.5mm Ultra-Thin Secondary Mirror Supports9x50 Straight FinderscopeDirect SLR Camera ConnectionTelescope Tube Length 144cm (Extended), 92.5cm (Retracted)3-Point tube locking systemWooden Alt-Azimuth Mount with Accessory Tray44% more Light Gathering than 250mm
This is the best "Telescope" I`ve ever was looking throu!... Lovely item!.... (But a little heavey, Thou) !
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3 of 6 people found this review helpful.
This is a superb telescope, best Iíve used in over 40 years of stargazing. The quality of the main optics is astounding; however Iíve only given it 4 stars because of a series of minor, but annoying faults that are by no means unique to this particular telescope.The feet on the base are too narrow for soft ground, had to be replaced with wider bits of wood.The eyepiece rack is in the wrong place, needs to be on the side.The base needs a spirit level.The large plastic cover over the bottom section of the tube needs a small knob so that you can remove it easily.There is way too much friction in the altitude bearing, at least one trunnion needs a thin smear of silicone grease.Even with a 400g widefield eyepiece in place, the tube still needs a 300g counterweight at the top end to balance properly.And finally, what is perhaps just a personal preference; it would be nice to be given the choice of either a conventional finder or a red dot unit when ordering.None of these mods would increase the price of the scope, but for me at least, they would really be the icing on the cake.Postscript March 2014 - Iíve been using the scope for 5 months now and can say that I am still delighted with it. The optical quality has been outstanding on a variety of objects, and no re-collimation has been required. I heartily concur with the previous reviewer in saying that the 12Ē is about the limit in size for convenient portability. The base only just fits through my shed door, and I use a sack truck and mini pallet to move the main tube around.I never really liked the standard altitude bearing, and have replaced the original small plastic lugs with larger glass/moly filled PTFE blocks. These, combined with the excellent roller bearing in the base now give me the smoothest Dobsonian mount I have ever used.
37 of 37 people found this review helpful.
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