Stellarvue SV70T Imaging System f/6 Triplet Refracting Telescope - Discontinued

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Stellarvue SV70T Imaging System f/6 Triplet Refracting Telescope - Discontinued

The 70 mm APO-TRI/2.5-inch R/P Focuser by Stellarvue: This fine piece of equipment is named as the Stellarvue 70 mm f/6 APO Triplet; featuring the latest version of the Stellarvue 2.5-inch dual speed rack and pinion focuser, this telescope set is a fine piece of craftsmanship for those planning to survey the night sky. It was designed using the sharpest and highest contrast 70 mm lens that Stellarvue has to offer, in conjunction with the aforementioned high quality focuser.  It also includes a dedicated .8x photographic field flattener/reducer converting the telescope into a 336 mm f/4.8 astrograph. This is no mass produced scope crafted with inferior glass nor sloppy mechanics- but a premier 70 mm Apochromat from Stellarvue, designed and crafted to exacting standards. 

The aforementioned lens is a 70 mm f/6 with a full focal length of 420 mm, fully multi coated. It is a three element objective lens utilizing the Ohara FPL-53 center element- and lens focuses light precisely and in addition, the extreme broadband coatings on each surface enhance performance even further. The visual result is a stunning display of vivid bright stars on a velvet black background of the night sky- contrast beautiful and dichotomous. These coatings transmit more than 99-percent into the visual spectrum and far above and below that- utterly eliminating reflections seen on CCD images. Combined with the relatively fast speed and high Strehl optics, this all comes together to make the 70 mm APO Stellarvue's widest field imaging telescope, and leaves the visual performance absolutely stunning.

The SV70T furthermore comes with an aluminum tube and dew shield finished in fine Instrument White, with Black Anodized aluminum fittings. The dew shield is designed to be able to retract when being stored- allowing you to reduce it's length notably to make it easier to fit away- meanwhile, extending that same dew shield minimizes overnight dewing of the objective, and provides a glare-shade during the daytime.

Let us continue on to mention the long labored over 2.5-inch Stellarvue visual and photographic focuser. Many years in the making, this latest design within that line is smooth and stable; a dual speed, 2.5-inch focuser providing an ultra smooth fine focus control at an 11:1 ratio, so as to ensure perfect focus is attainable every time with a minimum of work. Ideal for both visual and imaging use due to its design, this focuser provides a full 2.875-inch of travel. An internal brake system further enhances the design by allowing the user to adjust capacity as needed. Altogether this can be summed as one of the finest dual focuses available today. And indeed- summing all these features together, we find one of the finest 70 mm Apochromatic refractors available today!

Stellarvue 70 mm APO-TRI/ 2.5-inch R/P Focuser

  • Objective: 70 mm clear aperture, 420 mm focal length (f/6), apochromatic triplet with Ohara FPL-53 center element.
  • Tube Assembly: Machined aluminum tube painted Instrument white outside, ultra flat back inside.
  • A dedicated .8x photographic field flattener/reducer converting the telescope into a 336 mm f/4.8 astrograph.
  • Dimensions: The main tube is 82 mm in diameter. The complete telescope is about 14.75-inch long with dew shield extended and about 12-inch long when retracted. Dew shield is 3.5-inch in diameter.
  • Weight: The optical tube assembly weighs 4.4 lbs. 5.6 pounds with dual rings and Vixen rail.
  • Focuser: 2.5-inch dual speed Stellarvue rack and pinion focuser with 2-inch and 1.25-inch compression ring adapters. Precision rack-and-pinion focusers have better stability and a higher lifting capacity than 2-inch import Crayford focusers.
  • Rings: 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-inch apart.


Telescope Specs:

  • Optical Design: APO Triplet Refractor
  • Aperture: 70 mm
  • Focal Length: 420 mm
  • Focal Ratio: f/6
  • Tube Assembly: Aluminum, painted Instrument White
  • OTA Diameter: 82 mm
  • OTA Length: 12" (Dew Shield Retracted)
  • Dew Shield Diameter: 3.5"
  • OTA Weight: 4.4 lb. (without rings and rail)
  • Focuser: 2.5" Dual Speed Rack and Pinion
  • Dedicated .8x photographic field flattener/reducer 
  • Rings: R70SET
  • Case: C20 soft airline carry-on
  • Diagonal: Optional
  • Field Flattener Available: Yes. Optional. SFFR-70APO



Aperture70 mm (2.76")
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

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