Condition is "Used". The mirror is made of B270 “water white” optical crown glass that is free of internal stress and striae. Telescope Mirrors assorted . . It is far superior to most classic rack-and-pinion focusers: Large load capacity: Up to approx. 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. . Rs. Zambuto Optical Company is a full service custom manufacturer of premium Newtonian primary telescope mirrors from 7" through 24" diameter. . The GSO Dobsonian model serves a very clear purpose, to offer a large aperture and an excellent image quality at reasonable cost. $900.00 shipping. A simple teflon friction bearing used by some other manufacturers (also by GSO in the past) offers a rather stiff motion that makes tracking at high magnifications difficult. . B270 glass is equivalent to BK7 in performance and optical quality. | Shopping Italia 2280, 12 mm Plossl Eyepiece 1.25" . Manufacturers & Suppliers of Astronomical Telescopes in India, 8inch Professional Dobsonian Telescope by GSO. . . . This may be necessary when adding or using very heavy eyepieces or a Camera. Jim's Mobile, Inc. (JMI Telescopes) is a world renowned manufacturer of astronomical telescopes and aftermarket accessories for the amateur and professional astronomer. 3000, GSO SuperView 20mm 1.15" Wide Angle Eyepiece . GSO Parabolic Primary Mirror - 12" f/5. 2. You can collect more light with a larger aperture. $203.97 to $234.99. $7.85 shipping. The vertical motion of the STAR TRACKER tube is consistently ball-bearing smooth. The parabolic mirror size from 6" to 24", all of these mirrors were made by BK7 or Quartz quality optical glass, all mirrors have an enhance aluminum reflective coating, reflectivity is approximately 93%. . Rs. 2100. William optics 2" Dielectric diagonal. A scale on both sides allows you to easily achieve a symmetric bearing position. Will's recommendation for Manufacturers: At this size telescope you really have some nice choices. . Write a Review. Special Notice-We want to let our customers know that during this timeframe we continue to do business as usual. Only 7 left in stock - order soon. Condition is "Used". . 4.0 out of 5 stars 4. or Best Offer. 63mm m.a. Rs. A standard equipment eyepiece tray attaches to the side of the scope’s altazimuth base. In stock on December 30, 2020. The heart of any telescope is its optics. 11 sold. However, the price of the mirror increases as the mirror gets larger. Smooth Focusing Action $7.99 shipping. Shipping will be via the cheapest shipping method which will vary depending on the items in your order. There may be delays with regard to shipments due to outside circumstances beyond our control, but we continue to perform our optical … or Buy It Now. FREE Shipping. . GSO Dobsonian Telescope with an ADVANCE ROCKER BASE, 2" Crayford focuser - 1:10 micro - reduction from 2" to 1.25", 30 mm 2" Wide Angle ERFLE with 70° field for good overfiew, Eyepiece and Accessory Tray for Eyepieces. C $1,698.58. At the easiest (lightest) setting, the focuser moves extremely smoothly. 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", Padded Carry Bag for 8 inch Dobsonian OTA . . Also included is a 1.25"-2" adapter with brass compression rings that is threaded to accept standard 2" filters. Rs. Primary Mirror: 8” (203mm) diameter, 1200mm focal length, f/5.9 focal ratio with surface accuracy of 1/12 wave. 19 watching. A gentle twist on either knob adjusts the amount of friction within the altitude ball-bearing systems. 26 watching . A lightweight 4.7” diameter low-vibration cooling fan is built into the mirror cell to assure faster cool-down times. $54.00. Was: $160.99. . . Rs. 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The aluminum bearing housings fit snugly into cutouts in the sides of the altazimuth base.