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Stellarvue SV80ED-1 Refractor TelescopeThe Stellarvue SV80ED-1 Refractor Telescope is the latest version of the 80ED. The hand figured, extra low dispersion doublet is triple tested and provides razor sharp, high contrast views. Comes with 2” dual speed focuser, 1.25” adapter, cnc clamshell, Vixen rail and case.
Stellarvue designs and handcrafts the finest refractor telescopes. ED refractors offer the best value in an individually made, high contrast telescope. Using hand figured, extra low dispersion glass, these doublet refractors outperform simple achromats by a wide margin. This Stellarvue SV80ED-1 Refractor Telescope uses the same objective lens as all Stellarvue 80ED telescopes. The objective is a hand figured 80 mm clear aperture, 560 mm focal length (f/7) air-spaced doublet lens using Ohara extra low dispersion (ED) glass to reduce chromatic aberration or color fringing. Color correction and contrast is considerably better than an 80mm f-7 doublet achromat. While no f-7 doublet can give you the reflector like color correction of one of the apo triplets, this optic comes very close. Fully multicoated objective: The hand figured ED lens provides high contrast with several extreme broadband coatings used on all fthe lens. This boosts contrast: the stars appear vivid and the background, velvet black. These coatings transmit light above and below the visual spectrum, which is important to minimize reflections seen on ccd images. Stardust White aluminum tube and dew shield: The tube, dew shield, and fittings are precision machined. All aluminum parts are black anodized with a polished, high gloss finish. The dew shield retracts reducing the length of the telescope to only 17.5" when being stored and extends to minimize dewing of the objective at night. It can also serve as a glare shade during the day. Internal tube treatment: The inside of the tube assembly is painted "ultra flat black" and is fully baffled to eliminate reflection. The focuser is ultra flat black inside to reduce drawtube reflections. Dual speed Crayford focuser with precision bearings: The 2" Crayford focuser uses a compression ring and has three thumb screws to secure accessories and cameras firmly in place. A compression ring 1.25" adapter with 2" filter thread is also provided: The focuser has three focusing knobs, one on the left and two on the right. The single knob on the left and a larger knob on the right provide coarse focusing. On the right side is a second, slightly smaller, brass colored fine focus knob. This fine focus knob has an 11-1 rotation reducer, allowing for extremely fine focusing. The reducer in the Stellarvue focuser uses a hardened stainless shaft and precision ball bearings. It has greater longevity than some competitive dual speed focusers. A tension adjustment set screw is positioned under the focuser and a thumb screw allows for locking the focuser when engaged in astrophotography. The drawtube is inscribed with a millimeter scale on top. Two 5 mm threaded holes on top of the focuser allow for the attachment of two separate finder scopes. To rotate the focuser, simply loosen the rotation lock knob on top. Vixen mounting rail: This telescope has a Vixen sized rail. If you plan to mount this telescope on a larger mount that uses the Losmandy rail, the L-shaped mounting base will attach directly to the TP6 (Losmandy sized) plate with two screws to the existing rail. Supplied accessories: The Stellarvue SV80ED-1 Refractor Telescope comes with a foam lined, airline carry on case. This case will hold the telescope and other optional accessories such as a 2” star diagonal, reflex finderand numerous eyepieces. To operate the telescope you will need a star diagonal or erecting prism, eyepiece(s) and a mount or tripod. Light gathering and magnification power: The Stellarvue SV80ED-1 Refractor Telescope gathers 131 times the amount of light the naked eye can, revealing faint objects in space. Magnification power is dependant upon the eyepiece being used. Different eyepieces provide different magnification powers. Since the 80ED uses a highly accurate, hand figured objective lens that has been tested three times in the USA, these telescopes are free of coma and astigmatism seen in many import telescopes. This provides sharper details when viewing at higher powers. Dawes limit states that the maximum power for an 80 mm telescope under good conditions is about 186 power. Stellarvue SV80ED-1 Features
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