truss tube dobsonian telescope

layers: '24443' Large hand-tighten color-coded push-pull collimation and collimation lock knobs make it easy to collimate the primary mirror with no tools required. 2460, 15 mm Plossl Eyepiece 1.25" . The thumbscrew on the telescope side can be used to lock the focuser, allowing the use of heavy accessories or cameras without fear or slippage or losing focus. height: 160, Rs. The open frame of the cell allows the mirror to cool down to ambient temperatures quickly, so you can start observing sooner. . height: 160, . 16” (400mm) diameter, 1800mm focal length, f/4.5 focal ratio with surface accuracy of 1/12 wave. It is our firm opinion that GSO offers better mirrors in this price range. Quick view. 1 Review(s) SKU: EXP-DOB1045-00. The features :: 1. . The GSO Dobsonian line is particular model serves a very clear purpose, to offer a large aperture and an excellent image quality at reasonable cost. 110 Messier Object Locator     A4 size front back colour print, Star Dial - Identifying Stars & Constellations, Desiccant Cap - Refillable desiccant cap to protect fine optics, The Moon Map Poster B/W chart unfold to 22"x26", GS 990 Tube UP............: 63 cm x 63 cm x 42 cm3. The focuser has two large thumbscrews on the underside. Download Instruction Manual of 16inch Professional Dobsonian Reflector Telescope in .PDF format. By signing up for email, you agree that Orion has the right to use your data for such purpose. Please send me email about sales, new products, and astronomy. layers: '10024' Because we sell direct, we can offer you tremendous value at a great price. 2100, 9 mm Plossl Eyepiece 1.25" . width: 160, sourceSelector:'' A standard equipment eyepiece tray attaches to the side of the scope’s altazimuth base. The inner draw-tube barrel is anodized black and features a laser-etched scale. Also included is a 1.25"-2" adapter with brass compression rings that is threaded to accept standard 2" filters. And consider adding our email address (news@oriontelescopenews.com) to your email safe . It has cutouts to hold one 2” eyepiece and three 1.25” eyepieces. width: 160, 2280, 12 mm Plossl Eyepiece 1.25" . . sourceURL:'/catalog/includes/quicklook_miniproduct.jsp?entityId=109971&entityTypeId=4', layers: '24442' The following items are FREE with the telescope listed above. . Fully multicoated 2” 30mm (40x) 68° field SuperView Erfil design eyepiece with a wide 1.7° actual field of view that’s almost three and a half times the diameter of the full Moon. layers: '10148' }, { sourceURL:'/catalog/includes/quicklook_miniproduct.jsp?entityId=109999&entityTypeId=4', defaultImage: '', Rs. The Orion SkyQuest XX12i telescope is perfect for the observer looking for a portable big-aperture telescope. $1,799.99. sourceURL:'/catalog/includes/quicklook_miniproduct.jsp?entityId=109910&entityTypeId=4', }, { Now an employee-owned company, we pride ourselves on an unswerving commitment to best quality products, value and unmatched customer care. The inner barrel is baffled and painted a flat black to minimize reflections for maximum contrast. }, { layers: '10023' Rs. Instead of the usual large circular trunnion bearings riding on a few Teflon pads in the semi-circular cutouts in the altazimuth base, the STAR TRACKER Dob uses innovative sealed metal ball-bearing systems to provide smooth vertical motion of the optical tube. }, { to hear about our new products of quality products. Unique new roller side bearings with adjustable tension/braking by way of extra large, knurled side knobs! . . . sourceSelector:'' Rs. B270 glass is equivalent to BK7 in performance and optical quality. }. And when you're stargazing, Orion's telescope cases and covers, observing gear, red LED flashlights, astronomy books and star charts will make your observing sessions more convenient, comfortable and meaningful. A scale on both sides allows you to easily achieve a symmetric bearing position. Standard on all Truss-Dobsonians 12.0" and larger. Large ribbed clutch knobs are built into the two altitude bearings. You touch the focuser all the time, the focuser is responsible for holding your eyepieces or camera in position and moving them precisely into focus in the first place. This way ultra-precise focus motion is possible for both visual and particularly photographical applications. Add To Cart. 4800, GSO 2x ED-Barlow-Lens (Multicoated) . The focuser is the most "visible" part of any telescope with the exception of the optics themselves. }, { and special offers. . The mirror is ground and polished under computer control for guaranteed diffraction limited performance, coated with 91% reflectivity aluminum, and overcoated with a protective layer of silicon dioxide (quartz) for long life. . In this position tracking is almost impossible in some Dobsonians! height: 160, GSO's rated load capacity for their Crayford focusers is about 3 kgs. Elevation brake tension system. The battery-operated fan is powered by a battery pack that uses eight user-supplied AA batteries and plugs into a jack on the mirror cell frame. width: 160,

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