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Additional Info

This telescope uses the same objective lens design as all Stellarvue ED telescopes.  The objective is a hand figured 80 mm clear aperture, 560 mm focal length (f/7)  air-spaced doublet lens. The extra low dispersion (ED) glass to reduce chromatic aberration or color fringing. Color correction and contrast is considerably better than an 80 mm 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 multi-coated 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.

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 draw tube reflections.

Stellarvue 2.5” dual speed, rack and pinion focuser: Designed especially for smoother imaging, our new precise, dual speed rack and pinion focusers now come standard on all Stellarvue telescopes. These are fully rotating using an over-sized rotation collar and thumb screw. Tension control thumb screw underneath holds tight and eliminates all side play. For visual users, these focusers are ultra smooth and free of vignetting. For imagers, our dedicated field flatteners thread directly into each focuser, maintaining precise alignment. This is far superior to 2” Crayford focusers that are not threaded for accessories.

Supplied accessories: The 80ED comes with a 2” focuser and 1.25” adapter and caps. To operate the telescope you will need a star diagonal or erecting prism, eyepiece(s) and a mount or tripod. The mount may require a rail or plate.

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 dependent 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.

RECOMMENDED ACCESSORIES

Your telescope will need a star diagonal or erecting prism, eyepiece and mount in order to function. Since people have different preferences, we offer these separately. Here are our recommendations:

1. A star diagonal or an erecting prism.  If the telescope is  to be used for astronomy, use a  star diagonal such as our D1029ED or D1031ED. The D1029ED is a 2” diagonal that comes with a 1.25” adapter. It is the most flexible diagonal since either size eyepiece will work with it. If the telescope is used for  terrestrial viewing in the daytime, use an erecting prism such as our D1035 or D1032. The D1035 is a 2” unit with a 1.25” adapter making it the most flexible version to use.

2. Eyepiece. There are numerous types of eyepieces. Generally three or more eyepieces are us

ed, one  for low power wide field viewing, a medium power for seeing more structure in deep sky objects and a high power eyepiece to view the planets and double stars. Please see Eyepiece Recommendations below. 

3. Mount and tripod. There are numerous types of mounts so  these items are offered separately. Please see Mount Recommendations below.

Eyepiece Recommendations

Low power: This is the magnification you will want for  locating objects or viewing large, star studded fields as you scan the Milky Way  viewing thousands of stars. Here are a number of choices based on optimal  performance in each price range:

A. Stellarvue E4032 32 mm Plossl eyepiece This is the least  expensive wide field eyepiece we offer. It is a 50 degree, 1.25" eyepiece. It  performs as well as any 32 mm Plossl we have tested. Use this if you are purchasing a 1.25” star diagonal or erecting prism.

B. Stellarvue ESV30 eyepiece. The best 2" wide field  eyepiece in its price range. 68 degree field. Get a porthole view that is 20%  larger than the eyepiece above. This eyepiece will require a 2" Star  Diagonal or erecting prism.

C. Televue Nagler 22. This is the premium  recommendation offering superb correction across the field. It is an 82 degree 2" eyepiece. This eyepiece will require a 2" Star Diagonal.

Medium Power:  The Nagler 9 or 13 is recommended for this  telescope. It has an 82 degree field and is 1.25” so it will work with any star diagonal or erecting prism. If you decide to purchase the ESV30 above we suggest the Nagler 13 but if you select the Nagler 22 above we suggest the Nagler 9.  

High Power: For viewing details on the planets and splitting close double stars you must use high power.  Many inexpensive high power eyepieces have a very small eye lens making them difficult to use. Many also have very short eye relief so they cannot be used with glasses. We recommend our planetary eyepieces which have a large eye lens, 55 degree field of view, 20 mm of eye relief and a flat field.

Mount Recommendations. There are  two types of mounts to consider for use with this telescope:

1. Grab and Go Alt Azimuth Mount. This type of mount is the  lightest and easiest to use. It is the most popular mount sold with this  telescope. The Stellarvue  M2 Alt Azimuth Mounts are recommended as they are very smooth, stable and  easy to use. You simply slip the telescope into the dovetail shoe on the mount  and start observing. The M1 mount was designed for 70 - 80 mm telescopes. The M2 mount was designed for telescopes from 80 mm up to our SV115 It is superior to one arm fork  mounts since the telescope sits next to the center of gravity. This lessens  damping time considerably. Since this mount is so smooth, you simply glide  around the sky. Slow motion controls which are needed on rougher mounts are not  necessary. 

2. Equatorial Mounts: This is a heavier mount and it will  require some set up and alignment. We recommend two automated go-to mounts for  this telescope. The lighter and less expensive Celestron VX or the heavier and  more accurate Celestron CGEM. Both have computerized  go-to function and will track objects. Since these mounts are aligned with the  celestial pole, they may also be used for astro-photography. The VX mount may  be used with Stellarvue telescopes up to our 115. The CGEM can be used with  Stellarvue Telescopes up to and including our 130’s.