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Stellarvue SV 80ED Doublet Refractor OTA

Item# SVU006
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Description

A basic 80mm ED telescope with the Stellarvue 80mm f-7 ED lens. It has a dual speed,  rotating focuser, convinient for those with younger viewers. The L-shaped mounting bracket and balance plate included are ideal for mounting this telescope on a variety of mounts.


As the name implies, this is the basic version of our 80ED doublet refractor telescope.  This 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 our 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 four 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.


Black anodized aluminum tube and dew shield: The tube, dew shield, and  fittings are made of aluminum machined on an computer numeric controlled milling  machine. 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 has 11 baffle ridges to reduce drawtube reflections. These ridges are painted,  reducing the most commonly found type of  reflected glare.  This treatment  provides better glare reduction than focusers that only have the ridging to  prevent glare. All of these methods add up to provide  the  outstanding contrast of the  Apo triplet lens.


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. There is also a third 5 mm threaded  hole on the tube in front of the focuser for positioning a reflex finder further  forward. The focuser is fully rotating. To rotate the focuser, simply loosen the  rotation knob.


Vixen shaped mounting base: The SVR70ED has an L-shaped mounting base for  mounting the telescope to a heavy-duty camera tripod or to most  telescope mounts. The underside of the mounting base has two cork pads and two  1/4-20 threaded holes. The shape of the L-shaped mounting base is identical to a  Vixen rail, so it will work with most telescope mounts. 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 our TP6 (Losmandy sized) plate with two  screws. In addition, we include the TPBV rail to mount onto the bottom of the  L-shaped mounting base, allowing for better balancing with a variety of  accessories.


Supplied accessories: The 80ED comes with our C7 side reinforced, foam  lined, airline carry on case. This case will hold the telescope, star diagonal,  reflex finder and numerous eyepieces.


Light gathering and magnification power: The 80ED 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 our 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. Check the Recommended Accessories section to make the best choice for eyepieces.


Two year warranty and Stellarvue Service:  Stellarvue telescopes and accessories are covered by a two year warranty. But it  does not stop there. Since we are a telescope maker, we can repair your  telescope for a nominal fee years after it goes out of warranty, should you  accidentally drop it on concrete or otherwise damage it. Buy a Stellarvue  Telescope  with confidence. Our customer care is legendary.


Objective Lens - 80 mm clear aperture, 560 mm focal length, air spaced, doublet objective using extra low dispersion (ED) glass


Tube Assembly - All aluminum, fully baffled, precision machined optical tube assembly


Dewshield -  4 1/6" diameter fully retracting aluminum dewshield.


Focuser -  2" dual speed Crayford focuser with compression ring and a 1.25" compression ring adapter


Mounting Ring(s) -  Aluminum foot and included Vixen Balance rail


Dimensions -  3.5" diameter main tube and 4 1/16" diameter dewshield. OTA is 17 1/8" long and 19 3/4" with dew shield extended.


Weight - 6 1/4 pounds
 

Supplier Sku:
SV80ED Basic

Dimensions & Specifications

Brand

Stellarvue

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