It is our firm opinion that GSO offers better mirrors in this price range. 11 sold. In this article I will walk you through a variety of 8 inch telescopes and go over some of the important points, and of course, I will give you some guidelines when it comes to price. 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. Suggested Accessories with this Telescope. 3. $19.99 shipping. . Fully adjustable diagonal holder mounted on a low-diffraction four-vane thin spring steel spider. Large hand-tighten color-coded push-pull collimation and collimation lock knobs make it easy to collimate the primary mirror with no tools required. A Cooling Fan that quickly equalises the temperature of the mirror with surrounding air. C $1,698.58. The Crayford style focusing control makes achieving precise focus for visual observations and astrophotography a breeze and you will experience very smooth and precisely controlled focuser motion with zero backlash and zero image shift.Â. . GSO produces parabolic primary mirrors of very high quality. 29. $7.99 shipping. Rs. The aluminum bearing housings fit snugly into cutouts in the sides of the altazimuth base. . The focuser is the most "visible" part of any telescope with the exception of the optics themselves. The vertical motion of the STAR TRACKER tube is consistently ball-bearing smooth. The absense of Roller Ball Bearings in other branded Dobsonian Telescopes makes it very difficult to move the telescope on the wooden base. 2" Precission Micro 10:1 Crayford style focuser". . Only 7 left in stock - order soon. Ending Nov 29 at 4:17PM PST 5d 14h. . It has cutouts to hold one 2â eyepiece and three 1.25â eyepieces. A gentle twist on either knob adjusts the amount of friction within the altitude ball-bearing systems. B270 glass is equivalent to BK7 in performance and optical quality. A lightweight 4.7â diameter low-vibration cooling fan is built into the mirror cell to assure faster cool-down times. 3,900, GSO 1.25" 40mm Camera Projection Lens (CPL) eyepiece ... Rs.4,080, GSO 2" 30mm Camera Projection Lens (CSV) eyepiece ... Rs.5,700, GSO 2" 42mm Camera Projection Lens (CSV) eyepiece ... Rs.5,700. C $64.06 shipping. The focuser has two large thumbscrews on the underside. 8 inch f/6 Mirror Set, Primary Mirror, Secondary Mirror Price: US$ 259.95 ... Telescope Kits, Parts and Accessories! Our Price: $230.00. or Best Offer. We manufacture telescopes and accessories such as telescope wheels, carrying cases, guiding computers, focusers, motors and motor controls and much more. . . . . Condition is "Used". 00. Fully adjustable 3-point flotation system metal cell holds the primary mirror. Fully multicoated 2â 30mm (40x) 68Â° field SuperView Erfil design eyepiece with a wide 1.7Â° actual field of view thatâs almost three and a half times the diameter of the full Moon. Powerful 8x50 finderscope, multicoated objective lens. Rs. Was: $160.99. Described in Sky & Telescope's December 2001 issue, Gary Seronik's 8-inch travelscope features several innovations, among them a wooden secondary-mirror support that allows the secondary mirror's collimation to be easily adjusted by hand, without the tiny, hard-to-manipulate screws common to commercial units. Our #: PATM-GS-P8F6SET. . 18 INCH Glass Reflector Telescope Mirror Lens Optical Optics 1” Thick. . 110 Messier Object LocatorÂ Â Â Â 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", Padded Carry Bag for 8 inch Dobsonian OTA . However, the price of the mirror increases as the mirror gets larger. And the sealed ball-bearings will not have to be replaced regularly, as is the case with the Teflon pads of many Dobsonians when wind-borne grit degrades the Teflon/trunnion interface. Primary Mirror: 8” (203mm) diameter, 1200mm focal length, f/5.9 focal ratio with surface accuracy of 1/12 wave. $7.85 shipping. This becomes particularly obvious when the telescope is pointed near the zenith so that the lever arm becomes very short. Will's recommendation for Manufacturers: At this size telescope you really have some nice choices. 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.Â This way ultra-precise focus motion is possible for both visual and particularly photographical applications. The following items are FREE with the telescope listed above. The 8 x 50mm finderscope mounts in a quick release bracket that slips into a pre-installed metal mounting shoe nearer the focuser. 11 watching. This may be necessary when adding or using very heavy eyepieces or a Camera. Free shipping. B270 âwater whiteâÂ optical crown glass, coated with 91% reflectivity aluminum and overcoated with a protective layer of silicon dioxide (quartz) for long life. The bracket has two hand-adjust collimation screws that work in conjunction with a third spring-loaded post in the bracket. At the easiest (lightest) setting, the focuser moves extremely smoothly. Devi avere almeno 18 anni per entrare in questa sezione. 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.Â This way ultra-precise focus motion is possible for both visual and particularly photographical applications. A standard equipment eyepiece tray attaches to the side of the scopeâs altazimuth base. GSO makes the World's Finest Astronomical Mirrors with surface accuracy of 1/12 wave. B270 glass is equivalent to BK7 in performance and optical quality. 4800, GSO 2x ED-Barlow-Lens (Multicoated) . .Â Rs.Â 2820, 32 mm Plossl Eyepiece 1.25" . . The 2" focuser barrel features a brass compression ring so your eyepieces and other accessories will not be marred by the set-screw. 18 INCH Glass Reflector Telescope Mirror Lens Optical Optics 1” Thick. 2100, Mobile Cell Phone Adapter . . [ Subject To Availability ]. GSO Professional Dobs come with a 2" Wide Angle Super Plossl eyepiece for Wide Angle / Deep Space Observation, GSO's CNC Machined Crayford focuser comes with a 2" 'DUAL SPEED' 1:10 Micro Focusing Capability, 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, The new Altitude Metal Ball Bearings and Clutch System provides smooth vertical motion of the optical tube.