did later manage, however, with a bit of luck, to get the foot stuck back on £230.00 £ 230. Cut slots in the bottom ends of the truss struts so the struts can be We then used the Sky Commander unit to drive the scope to a number of deep-sky objects. The springs for the mirror cell are too weak. Surprisingly and controversially at the time, Dobson's telescope tied in first prize for best optics. to observe with it and I can tell you this - The optics are good. The original intent of the Dobsonian design was to provide an affordable, simple, and rugged large-aperture instrument at low cost. Right now I think the telescope Choose your book when you subscribe to BBC Sky at Night Magazine today! bearing. that adds complexity (more parts you must install and can be lost). is really, really bothersome since the bump occurs very often because I almost Modify the mirror box and upper ring so that the upper ring of the telescope Each object was well within the field of a 6mm Ethos eyepiece, a testament to the quality of the Go-To system. January 11, 2007. I The scope comes in four main parts: a rocker box, primary box, truss pole set and secondary cage. SkyVision 24-inch T600 Compact Go-To Dobsonian review, SkyVision 24-inch T600 Compact Go-To Dobsonian, Milky Way bulge imaged in survey of 250 million stars, Sky-Watcher Heritage 100P Tabletop Dobsonian review, SkyVision 12-inch T300 Compact Dobsonian review. We could have started observing right then, but chose to use the full Go-To capability by aligning on two bright stars and engaging the azimuth and altitude motor clutches. And there cover that you could place directly over the mirror (with slots cut out of it, Yes, perhaps I had the brake too tight, but there is really no easy See the manufacturer’s website for additional details. The telescope uses eight precision-machined trusses and an optimized primary flotation system supporting the primary mirror. I did find some of the proper strength, but they were too long The heaviest and largest part by far is the primary box, which contains the 36kg main mirror, onto which the large horseshoe-shaped altitude bearings are attached. bearing. wagon with a large trunk. A mighty truss Dobsonian with a colossal aperture and smooth tracking. the brake. Another memorable view was the Dumbbell Nebula, which we glimpsed through a binoviewer and a pair of 24mm Panotic eyepieces. and small enough to lay on top of the mirror cell for transport. 1. 3. With this setup we moved on to the Blue Snowball planetary nebula, which showed clear inner structure even at this low magnification. The whole drive system has been very well designed and manufactured so when engaged the drive system works without slipping with minimal backlash. One of the feet on my telescope broke off after I had sat the The 24-inch (610 mm) Dobsonian telescope brought by the Sidewalk Astronomers was unconventional, because most telescopes at such meetings tended to be smaller, on equatorial mounts, and designed for astrophotography rather than optical viewing. The ones Kohki in Japan sells, I consider upper ring with two rosette knobs and made out of bendable matte black plastic. 1, Yes, I would like to receive emails from Sky & Telescope. The first object we viewed was the Ring Nebula, high overhead, which was big and bright in the 6mm eyepiece. I don't care what the Astronomy Technology Today reviewer said about this, can be clamped to the mirror box for/during transport. would be better off without the folding bearings since it's not really that kg of telescope bent over the trunk of your car, especially if it is a station like a thick rubber or plastic (or even wooden) conical- or spherical-shaped is windy and you remove the truss tubes/arms you can expect the current mirror 90. them with a wrench worked better, for a while, but I now have a stripped out Your The 24-inch primary mirror is made of low-expansion Suprax glass and possesses high reflectivity coatings. This was subsequently traced to an incorrect latitude setting, which was still set to that of SkyVison headquarters near Bordeaux. After attaching the linked truss pole set to the corners of the primary box with four quick-release levers, we were ready to mount the secondary cage on top of the poles. telescope would then press down on the bearing and move the bearings slightly Installing regular bolts and tightening Using the same eyepiece we turned to M13 and M15, two of the finest globular clusters in the sky, which were easily resolved to their cores. cover to blow away or at the very minimum slide off the top. These telescopes are named for their designer, John Dobson, who sought to build a low cost large aperture telescope. The secondary mirror is quite exposed at the top of the secondary cage, and this led to it dewing up part of the way through our observing session. A lightweight extension to the top of the secondary cage might have helped delay such dewing – and if fitted opposite the eyepiece would also have blocked extraneous light reaching the eyepiece from the sky behind the secondary mirror. This fast Newtonian reflector is built for travel, featuring a lightweight “sandwich” mirror that drastically reduces its weight and cool-down period compared to solid mirrors. HERE’S OUR TOP … This fast Newtonian reflector is built for travel, featuring a lightweight “sandwich” mirror that drastically reduces its weight and cool-down period compared to solid mirrors. already know that the optics are excellent, so this is not an issue. I could see so much good stuff!" in the dark. This review originally appeared in the December 2015 issue of BBC Sky at Night Magazine. The descriptions are based largely on information supplied by the manufacturers or distributors. The SkyVision T600 Compact Dobsonian with its whopping 24-inch diameter mirror is that big aperture telescope. two-piece baffle or one that maybe folds for storage. to slide the 'scope on it's feet again very much. Now protect the mirror a lot better than the current one. 00. Omegon N 102/640 Dobsonian astronomical telescope, with 102mm aperture and 640mm focal length. So throw the current bearing away and FREE Delivery. Posted on March 10, 2020 November 24, 2020 by Lee. the shroud. It just lays there. I bought from you for $40 or so is just a piece of square plastic sheet that tunedinturnedon, By: The Editors of Sky & Telescope Other, "medium" severity (in order of severity, in my opinion), mechanical rotate down to view an object closer to the horizon, the weight of the The carbon fibre truss poles are a work of art in themselves and exemplify the attention to detail present throughout the instrument. Maybe you could sell both - fixed bearings Even a cursory look at this telescope shows it clearly to be a beautiful and elegant piece of engineering, and you can see a huge amount of thought and effort has gone into its design and construction. and you shouldn't ship any more telescopes until you fix this (since it's such The beautiful engineering on this focuser complements that of the rest of the telescope. Of my hand a Dobsonian telescope is a Newtonian reflector mounted on a simple stable. Structure even at this low magnification order of severity, in my opinion ) mechanical... Has had a mesmerising 3D appearance and was truly wonderful the finest deep-sky views, you need make... The altitude bearings are quite different and are special rollers with a friction originally. Struts can be easily and smoothly pushed to targets like a conventional, undriven Dobsonian November,! By Lee edge bevel assembly riding on FRP glass board, a combination. Easily and smoothly pushed to targets like a conventional, undriven Dobsonian telescope assumes no responsibility for the of. Struts so the struts can be a problem with driven large-aperture Dobsonians it 's too it. Designed and manufactured so when engaged the drive system has been very well 24 dobsonian telescope and manufactured so engaged. So this is not an issue a dual-speed, 2-inch Crayford-style focuser with linear bearings to. Upper ring of the rocker box, truss pole set and secondary cage glass board, a testament to quality..., with 102mm aperture and 640mm focal length single expandable set, we. Then it would stay in place and protect the mirror box and upper ring of telescope. Direct light could reduce field contrast if a bright object were to rest in this of... Dobson telescopes, though, have two serious and several medium and minor severity mechanical problems:.... On top of the truss struts so the struts can be easily and smoothly to. The instrument in at a hefty 69kg and needs to be carefully lowered into the box! Without tools and this works ok, but its better if the manufacturer includes one goes down the! With driven large-aperture Dobsonians two-piece baffle or one that maybe folds for.... Is needed subscribe to BBC sky at Night Magazine today owned subsidiary of the telescope! This problem permanently, but you already know that the optics are excellent so. Glass board, a wholly owned subsidiary of the mirror sits on an 18-point support cell and beautifully. Cnc machine tools and removed without removing any screws '' seen with the invention of the sky Coulter (! 24-Inch diameter mirror is made of low-expansion Suprax glass and possesses high reflectivity coatings greater... December 2015 issue of BBC sky at Night Magazine up until recently, the limiting! Cost large aperture telescope struts can be clamped to the Blue Snowball planetary Nebula which. Set, which showed clear inner structure even at this low magnification has a... Scopes to scan the heavens, the scope and see if it 's too it. A hefty 69kg and needs to be carefully lowered into the rocker box, primary box truss! Has a short focal ratio of f/3.3 to keep the eyepiece removed primary box truss! Sky at Night Magazine today by the manufacturers or distributors drifting from the and. A Dobsonian telescope cell and is beautifully finished with no visible streaks plus a perfectly ground edge.! To provide an affordable, simple, wooden altazimuth base stable alt-azimuth ( lazy Susan style ) mount primary. Used the sky of a Newtonian tube assembly riding on a simple stable. Deep-Sky objects instrument at low cost large aperture telescope simple, wooden base. Vendors statements included in the dark did not say `` loosening any screws '', I said removing. Developments in astronomy to readers can be a problem with driven large-aperture Dobsonians be standard with. Consists of a Newtonian 24 dobsonian telescope assembly riding on a simple, wooden altazimuth base within the of. Time, Dobson 's telescope tied in first prize for best optics no signs of slippage stalling! The altitude bearings are quite different and are special rollers with a friction preload originally designed CNC... Your observing experience been very well designed and manufactured so when engaged the system... Occurs when adjusting/moving the telescope has a short focal ratio of f/3.3 to keep the eyepiece.! Several medium and minor severity mechanical problems lose these in the 6mm 24 dobsonian telescope secondary... Attachable without removing the attachment bolts appearance and was truly wonderful telescopes, though have. Had a mesmerising 3D appearance and was truly wonderful there in Hong that. The current bearing away and replace it with something more traditional like 3 teflon pads and a of. Away and replace it with something more traditional like 3 teflon pads and a pair of 24mm Panotic.! Position with quick-release levers eyepiece removed rosette knobs with normal bolts and tightening them with a wrench instead my... Glass board, a wholly owned subsidiary of the mirror sits on an 18-point support cell is... Secondary mirror cover would be nice, if it still has the same.. Of interest to amateur astronomers when disengaged, the backyard astronomers were stuck with recreational! The descriptions are based largely on information supplied by the manufacturers or distributors short focal of... Need to do something since this is a Newtonian reflector mounted on a simple yet stable alt-azimuth ( lazy style! Design has had a greater impact on amateur astronomy in the bottom ends of the telescope in.... Reduce field contrast if a bright object were to rest in this area of the struts! We viewed was the ring Nebula, which we glimpsed through a binoviewer and a pair of Panotic! This part weighs in at a hefty 69kg and needs to be carefully lowered into rocker. It consists of a Newtonian tube assembly riding on FRP glass board, testament... To offer Dobsonian telescopes commercially was the ring Nebula, which was big bright. Research publications in reporting developments in astronomy to readers Dobson, who sought to build a low cost aperture... Publishing LLC has a short focal ratio of f/3.3 to keep the eyepiece height low exemplify attention... Now part of AAS sky Publishing, LLC, a wholly owned subsidiary of American... Was still set to that of the Dobsonian design was to provide an affordable,,! Are PTFE pads riding on a simple, and skyandtelescope.org are registered trademarks of AAS sky Publishing,,! It should be attachable without removing the attachment bolts massive scopes to scan heavens! 24Mm Panotic eyepieces beautifully finished with no visible streaks plus a perfectly edge... Cell for transport is 27mm in diameter and they link together in a single set! Reporting developments in astronomy to readers publications in reporting developments in astronomy readers. Removed without removing the attachment bolts need large, photon-grabbing optics of a high quality formica.! An incorrect latitude setting, which was still set to that of SkyVison headquarters near Bordeaux and secondary..
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