Stellarvue SV70T f/6 Triplet Refracting Telescope

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Stellarvue SV70T f/6 Triplet Refracting Telescope

The Stellarvue SV70T-25SV features a 70 mm f-6 (420 mm focal length) fully multi-coated, 3 element objective lens with a Hoya FCD100 center element.

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 70 apo our widest field imaging telescope and the visual performance is simply stunning.

We now offer rider blocks with or without longer rails. These allow the telescope to balance properly when camera gear is used that moves the center of balance over the focuser. The riser blocks raise the telescope 1.5" above the rail and this allows the rail to extend under the focuser and camera. The telescope can then be moved forward and balanced.

Tube and dew shield: The SV70T 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.

2.5" Stellarvue visual/photographic focuser: Many years in the making, our new smooth and stable dual speed, 2.5” focuser provides a full 2.875" of travel. This focuser is perfect for visual use and imaging. The 2.5" focuser has an ultra-smooth (10:1 Ratio) fine focus control to attain perfect focus every time. An internal brake system allows the user to adjust capacity. All of the features add up to one of the finest dual speed focusers available today.

Aluminum hinged rings: The SV70T comes with two heavy duty, hinged aluminum mounting rings. Each ring has three screws top and bottom. Threaded holes are 1/4-20. There is one center hole, two holes spaced 1.5" apart. Use the included rail for telescope mounts using the Vixen style rail or use an optional TP6 for mounts that use the larger Losmandy style rail.

Case: The SV70T 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: A 70 mm refractor gathers 100 times the amount of light the naked eye does. Although Dawes limit states maximum power for telescopes under good conditions is about 165 power for a 70 mm telescope, you can exceed this power on a steady night. This is a true apo triplet capable of high power when conditions permit. The only real limiting factor under steady air is the light gathering limitation of this telescope. Check the Recommended Accessories section to make the best choice for eyepieces.

70 mm clear aperture, 420 mm focal length (F-6), apochromatic triplet with a Hoya FCD100 center element. Has a .95 Strehl minimum standard, Zygo test report included.

Machined aluminum tube painted Instrument white outside, ultra flat back inside.

The main tube is 82 mm in diameter. The complete telescope is about 14 3/4” long with dew shield extended and about 12” long when retracted.

Dew shield is 3.5" (88.6 mm) in diameter.

The optical tube assembly weighs 4.4 lbs. 5.6 pounds with dual rings and Vixen rail.

2.5" dual speed Stellarvue rack and pinion focuser with 2" and 1.25" compression ring adapters. Precision rack and pinion focusers has better stability and a higher lifting capacity than 2" import Crayford focusers.

Custom Stellarvue R70SET precision hinged rings. Each ring has three 1/4-20 holes top and bottom with one in the center and two spaced 1.5” apart.

Includes vixen style rail.

The SV70T 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".

Optional. Please note, you can purchase our 2" Quartz Dielectric diagonal upgrade for only $199 above. The upgrade diagonal is the same as the D1040Q deluxe dielectric diagonal but it does not come with a 1.25" adapter since the telescope already has

Optional. We carry the F001 red dot finder and the F002 multi reticle finder.

Optional. We recommend the SFFR70 focal reducer/field flattener.

LIGHT GAIN: 100X (Human eye = 1)

Image Circle with .8X Reducer/Flattener: 27mm


Aperture70 mm (2.75")
Camera/Eyepiece Connection2" nosepiece
Dawes Limit1.66 arcseconds
Dew Shield Size89mm
Focal Length420 mm
Focal Ratiof/6
Free ShippingYes
Glass TypeFPL53
Hightest Magnification140x
Light Gathering Power100x
Limiting Magnitude13
Optical DesignTriplet
Tube Diameter82mm
Tube Length375mm
Tube Weight5.6 lbs

Customer Reviews

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John L.
United States

Weather to bad to use Stellarvue70

My weather has been to cloudy or if clear the moon to bright to test the scope properly with the equipment I plan to image with it. It looks well made but I have not figured out a guiding method. I plan to use this if I go more south than I am now. John L

David S.

The Little Big Scope

This scope is tiny and fits in my standard camera bag, but it shoots like refractors twice its size. It comes with a nice padded case, but the case is a little bulky for travel, so its easier to just throw it in my 70-200mm slot in my camera bag.

Carol S.

Aperture does not "always" rule...

I got this little refractor to ride piggy back on my CPC 1100 to provide a wide field view of the objects I'm observing and it's surrounding sky. I was so impressed by the stunningly sharp views provided by the SV70t that I now use it at star parties to show "Big Things in a little scope". It's fun to hear the folks gasp with astonishment at the tack sharp view they see in there! I get multiple questions about the scope itself afterward because the view is so amazing. Carol