![]() ![]() The thermal stability of B270 glass is generally better than the soda lime float glass used for the mirrors of most reflectors in this reasonable price range. B270 glass is equivalent to BK7 in performance and optical quality. The mirror is made of B270 “water white” optical crown glass that is free of internal stress and striae. We guarantee a diffraction-limited performance, which essentially means that the performance is limited by observing conditions and the laws of physics.ġ0” (254mm) diameter, 1250mm focal length, f/5 focal ratio with surface accuracy of 1/12 wave. It is our firm opinion that GSO offers better mirrors in this price range. GSO produces parabolic primary mirrors of very high quality. The heart of any telescope is its optics. This makes collimation faster than the traditional three- or six-screw collimation methods used with conventional finder brackets. The bracket has two hand-adjust collimation screws that work in conjunction with a third spring-loaded post in the bracket. The bracket is held in place in the mounting shoe by a single large hand-tighten knob that maintains the finder’s collimation, even if the finder is removed between observing sessions. The 8 x 50mm finderscope mounts in a quick release bracket that slips into a pre-installed metal mounting shoe nearer the focuser. This little telescope will show many objects in direct vision for easy location. Powerful 8x50 finderscope, multicoated objective lens. Physical Copies of the manual will not be given. Please Download INSTRUCTION MANUAL in PDF from the link provided below. GSO Dobsonian Telescopes are fully manufactured using CNC Machines and they are MADE IN TAIWAN, not CHINA like other brands. The absense of Roller Ball Bearings in other branded Dobsonian Telescopes makes it very difficult to move the telescope on the wooden base. This negates the wobbly effect / air turbulance caused due to variations in temperature.Īzimuth Roller Bearings provided at the bottom of the Dobsonian base allows super fine horizontal tracking of celestial objects. Ī Cooling Fan that quickly equalises the temperature of the mirror with surrounding air. ![]() The new Altitude Metal Ball Bearings and Clutch System provides smooth vertical motion of the optical tube. GSO Professional Dobs come with Tube Balancing System that allows you to perfectly balance the tube when you add an additional DSLR Camera to the telescope GSO's CNC Machined Crayford focuser comes with a 2" 'DUAL SPEED' 1:10 Micro Focusing Capability. Ĭomes with a large 8x50 Multi-Coated Achromatic Finderscope GSO Professional Dobs come with a 2" Wide Angle Super Plossl eyepiece for Wide Angle / Deep Space Observation. ![]() GSO makes the World's Finest Astronomical Mirrors with surface accuracy of 1/12 wave. GSO Dobsonian Telescope with an ADVANCE ROCKER BASEĢ" Crayford focuser - 1:10 micro - reduction from 2" to 1.25"ģ0 mm 2" Wide Angle ERFLE with 70° field for good overfiewĮyepiece and Accessory Tray for Eyepiecesĭust Cap Why chose a GSO Dobsonian Telescope over other brands ? The deluxe model comes with 2" Micro 10:1 Crayford style focuser and 1.25" adapter. Set-up is as easy as you can imagine very simple assembly with the rocker box and put it on the ground, insert the telescope tube and put the springs in position and you're ready to go to navigates through the night sky by simply moving the tube up or down, or side to side, by hand.Īll GSO dobsonian use optical quality BK7 glass, cooling fans built into the rear cell to decrease cooling times, also all dobs use a roller bearing on the azimuth surface providing dozens of support points for smooth swivel motion. 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.
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