Vixen A80Mf 80mm f/11 Achro Refractor Telescope with Porta II Mount

Vixen A80Mf 80mm f/11 Achro Refractor Telescope with Porta II Mount

Vixen A80Mf 80mm f/11 Achro Refractor Telescope with Porta II Mount

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The Vixen A80Mf 80mm f/11 Achro Refractor Telescope with Porta II Mount is capable of rendering high-resolution planetary, lunar, and deep-sky images and with the included 90° erect-image diagonal installed, the scope can be used as a conventional terrestrial spotting scope. This version of the A80Mf comes with the Porta II alt-azimuth mount, two eyepieces, the diagonal, and a finder scope.



Optical Design Achromatic Refractor
Aperture 80 mm
Focal Length 910 mm
Focal Ratio f/11.4
Eyepiece Barrel Diameter 31.75mm
Diagonal 90° Erecting
Finderscope Yes
Mounting Vixen Style
  • 80mmAchromatic Refractor OTA
  • 910mm Focal Length, f/11 Focal Ratio
  • Multi-Coated Optics
  • Porta II Manual Alt-Azimuth Mount
  • Dual-Axis Slow-Motion Cables
  • 6.3mm and 20mm Eyepieces
  • Threads for Optional Camera T-Rings
  • 90° Erect-Image Diagonal
  • 6x30 Finderscope with Bracket
  • Adjustable-Height Aluminum Tripod

Vixen Optics A80Mf 80mm f/11 Achro Refractor Telescope (OTA Only)

The Vixen Optics A80Mf 80mm f/11 Achro Refractor Telescope is designed with an achromatic lens system that produces bright and clear high-contrast images with true color representation across its entire distortion-free field of view. Its 80mm objective gathers more light than smaller-objective models while still being easy to handle and transport, especially when you have to carry it a distance to your observation site. This lens system, coupled with the fully coated optics, will give you great views of the Moon, planets, planetary moons, and brighter deep sky objects. You will be able to split binary stars and observe bright objects with virtually no comas.

Optical Tube Assembly

  • 80mm objective
  • f/11 focal ratio
  • 910mm focal length
  • Refractor-style optical path
  • Achromatic lens configuration corrects spherical and chromatic aberrations to produce distortion-free high-contrast images with true color representation
  • Fully coated optics produce bright and clear images with true color rendition
  • Resolution: 1.45 arcsec
  • Rack-and-pinion focuser with  focusing tube
  • Standard 42mm T-thread for prime-focus astrophotography; optional camera-specific T-ring required
  • Dew/sun shield reduces interference from peripheral terrestrial light and limits condensation on objective


  • OTA only mount and tripod required for proper use
  • Mounting ring assembly enables the optical tube orientation to be adjusted for precise eyepiece placement and to avoid interference with other gear
  • Weight: 5.5 pounds

Vixen Optics Porta II Alt-Azimuth Mount

Built to support a 9.07 payload, and equipped with two fine adjustment handles for whole circle slow motion in both directions, the Porta II Mount from Vixen comes with a sturdy set of legs that adjust from 35 to 51 inch. The Porta II minimizes support-system-oriented frustration when searching for and tracking celestial objects.

The Porta II is solid, and its slow-motion flexible handles minimize vibrations to keep the view sharp. Precision tracking of planets and ships on the horizon becomes a simple event thanks to a fine-tooth geared drive that's activated by turning the elevation or azimuth control handles.

  • No locks or clutches
  • Portable alt-azimuth mount with precision slow-motion control in both axes
  • Slow-motion control with whole circle movement via 120-tooth wheel gears
  • Tripod legs height adjustment
  • Mount can be removed and used on heavier tripod if needed.