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Stellarvue SV80ST 80 mm f/6 Apo Triplet Refractor Telescope


Stellarvue SV80ST 80 mm f/6 Apo Triplet Refractor Telescope

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Product Description

This is the Stellarvue 80 mm f-6 apo triplet made using our deluxe 2.5" dual speed, rack and pinion focuser. It uses the sharpest and highest contrast 80 mm apochromatic triplet lens we have ever offered. The focuser is threaded for photographic field flatteners sold below and has 1 1/4” and 2” compression ring visual adapters. This telescope also comes with heavy duty dual rings and a C19 heavy duty travel case. This is not a mass produced scope using inferior glass and sloppy mechanics. This is a truly premier 80mm apo. 

The Stellarvue SV80ST-25SV features an 80 mm f-6 (480 mm focal length) fully multi-coated, 3 element objective lens with an Ohara FPL-53 center element. 

zygo-testing-80st-Apo lenses.jpgsv080st2-zygotest.jpg


Fully multicoated apo triplet objective: The high Strehl, apochromatic triplet objective is triple-tested at Stellarvue to ensure that it performs perfectly. Lenses are better than .95 Strehl, the same as our former Russian made Lomo lenses. We are now taking the time to provide interferometric test reports with each of our triplet refractors showing how the lens in your telescope actually performs. Hitting a Strehl ratio of at least .95 means your telescope will perform perfectly.

Each lens focuses light precisely and in addition the extreme broadband coatings on each surface enhance it even further. Using it visually, the stars appear vivid and the background, velvet black. Since these coatings transmit more than 99% in the visual spectrum and far above and below it, reflections seen on ccd images are eliminated. The relatively fast speed and high strehl optics make the 80 apo an excellent wide field imaging telescope while the visual performance is simply stunning.

Tube and dew shield: The standard model (SV080ST-25SV) comes with an aluminum tube and dew shield that is finished in Instrument White. Fittings are black anodized aluminum. The dew shield retracts reducing the length of the telescope when being stored. Extending the dew-shield minimizes dewing of the objective at night and serves as a glare shade during the daytime. 

Internal tube treatment:  The inside of the main tube assembly is painted "ultra flat black" and is baffled to eliminate tube wall reflections.

Difference between aluminum and carbon fiber tubes: The aluminum tube of the SV80ST cools down rapidly and is nearly the same weight as composite tubes. We feel that aluminum is is the best material for this particular telescope as it cools down rapidly and allows for perfect alignment through precise CNC machining. 

2.5" Stellarvue visual/photographic focuser: Many years in the making, our smooth and stable dual speed, 2.5” focuser provides a full 3.2" of travel. This focuser is perfect for visual use as well as imaging. The rear of the draw tube is threaded to accept our dedicated SFF6-25 photographic field flattener (for cameras with APS size sensor). The Stellarvue focuser is a heavy-duty rack and pinion unit designed to carry a higher capacity. It has an ultra-smooth (7:1 Ratio) fine focus control to attain perfect focus every time. An internal brake system allows the user to adjust capacity. The focuser is fully rotating with a wide groove for smooth and precise rotation. All of the features add up to one of the finest dual speed focusers available today. If you prefer the Feather Touch focuser, it can be ordered using the "Replace Stellarvue focuser with 2.5" Feather Touch focuser" option above. The vast majority of our customers use the Stellarvue focuser which has the same size and capacity and is as smooth as the Feather Touch.

Motorized Focuser Options: Optec and Starizona

Aluminum hinged rings: The SV80ST comes with two-hinged, American-made, cnc-machined aluminum mounting rings. Each ring has five screws top and bottom. Threaded holes are  1/4-20. There is one center hole, two holes spaced 1.5" apart and two holes spaced  60 mm apart. Use the optional TP14 rail for telescope mounts using the Vixen style rail or use the optional TP6 for mounts that use the larger Losmandy style rail.

Case The SV080ST comes with a thickly padded, C20 airline carry-on case. Outside dimensions: 22" x 9.5" X 7.5". Inside dimensions: 19.5" X 6" X 5".

Light gathering and magnification power: An 80 mm refractor gathers 131 times the amount of light the naked eye does. Although Dawes limit states maximum power for telescopes under good conditions is about 189 power for an 80 mm telescope, you can exceed this power on a steady night. This is a true apo triplet capable of high power when conditions permit. Check the Recommended Accessories section to make the best choice for eyepieces.

Two year warranty and Stellarvue Service:  We are with you for life. 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 very 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. 

What else do you need?  

To use your telescope visually, you will need: 

  • a star diagonal
  • eyepiece(s)
  • a mount and tripod
  • a finder scope and adjustable finderscope rings

To take astro-photos you will need a photographic field flattener designed for this telescope. 


Here are the specific items we recommend for using this telescope visually:

Star Diagonal:

Just click the option for the 2" Dielectric Star Diagonal button above to the right of the telescope's picture.


High Power Eyepiece for Planets, double stars and close views of the moon. We recommend either the EP 04.9, the EUW 04.0 or the EOP 03.6. Get the one with the widest field of view you can afford. 

Medium Power Eyepiece for deep sky objects including galaxies, star clusters and nebulae. We recommend the EUW 08.0 or the EOP 09.0. Get the one with the widest field of view you can afford. 

Low Power, Wide Field Eyepiece for larger extended objects, loosing yourself in the star fields of the Milky Way, etc. We recommend one of two options. If you are using a go-to computerized telescope mount the E7026R can serve a dual purpose. This eyepiece provides a wide 70 degree field of view and it has a crosshair reticle built in. This reticle will assist you in centering the three stars when you set up your telescope to operate in go-to mode. You can optionally purchase an illuminator for the eyepiece to make it easy to see the crosshair. Since this eyepiece is economical and has the crosshair, many of our customers like using it.

For better overall correction and the widest field of view get the EOP 20.0

Mount and Tripod:

Easy to use alt-azimuth mountUse this with a heavy duty camera tripod such as Manfrotto 475. 

Computerized motor driven equatorial mount and tripod that is portable and economical


Multi-reticle finderscope

Finderscope base

To use your telescope in taking astro-photos we recommend one of the following:

  • For cameras with an APS or smaller chip use the SFF6-25.

Please note: each camera (and even each t-ring) has different spacing. We want to make this as easy as possible for you so please call us at (530) 823-7796 if you have any questions and we will assist you in getting the correct parts in order to attain the best images.

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