Vixen SD103S f/7.7 Doublet Refracting OTA Telescope

  • Coating :Multi-Coating
  • Adapter Thread: 60 mm/ 42 mm for T-Ring
  • Astrophotography: Prime Focus, Eyepiece Projection and Afocal Imaging
  • Visual Back : 50.8 mm and 31.7 mm Push-fit with the supplied flip mirror diagonal
  • Optical Design: SD Apochromatic Refractor


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  • Regular price $2,800.00
  • $1,999.00
  • You save: $801.00 (28%)

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Vixen SD103S f/7.7 Doublet Refracting OTA Telescope

SD103S f/7.72 Refractor Telescope OTA

Vixen's new SD103S apochromatic refractor features high-performance Super ED Glass (SD) made of leading-edge FPL53 glass to deliver extremely clear and sharp images by eliminating color aberration. The SD glass is designed to gather all g-ray (purple), C-ray (red), F-ray (blue), d-ray (yellow), and e- ray (green) to about a "0" value, which makes this excellent lens material that reduces chromatic aberration over all colors.

The light baffle positions in the drawtube are arranged to take advantage of the entire field of view of a DSLR camera with a full frame image sensor.

When used in combination with the new optional SD Reducer HD Kit or SD Flattener HD Kit, you will have a 44 mm image circle with full-format (D)SLR cameras.

Note: The Reducer DH, sold separately, includes the SD Flattener DH and is essential for wide field astrophotography with the SD Scopes. Eyepieces sold separately.


AP 176mm)
Aperture103 mm (4")
Camera/Eyepiece Connection2" Nosepiece
Dawes Limit1.13 arcseconds
Focal Length795 mm
Focal Ratiof/7.72
FR f/7
Highest Magnification206x
Light Gathering Power217x
Limiting Magnitude13.8
Optical DesignDoublet
Tube Diameter115mm
Tube Length810mm
Tube Weight12 lbs



  • Finder Scope: 7 x 50
  • Tube Rings
  • Flip Mirror
  • Diagonal
  • Dovetail Plate
  • Carry Handle