Vixen SD115S apochromatic Refractor OTA

Product code: X000063
in stock
£2,450.00 UK Price
£2,041.67 (ex. VAT) International Price
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Product information

  • High-quality SD refractor with 115 mm aperture
  • 890 mm focal length, f7.7
  • Bright, pure-colour and extremely sharp image
  • Also suitable for full-frame cameras
  • Optional reducer and flattener available
  • Portable and lightweight, despite large aperture
  • Very high contrast thanks to SD glass
  • Ideal for observing the moon and planets
  • Dimensions: 930 mm x 125 mm, weight: 6.2 kg
  • Made in Japan according to stringent quality standards

A new apochromatic refractor with high-performance Super ED glass (=SD).
The FPL53 glass reproduces an extremely clear and sharp image by eliminating residual chromatic aberration.
Another advantage of these SD refractors is their short length and lightweight design.
The SD glass is designed to focus all beams of violet, red, blue, yellow and green light exactly onto the same level.
The special lens material reduces chromatic aberration across all colours.
Together with the new optional SD Reducer HD Kit or SD Flattener HD, these refractors provide illumination with a 44 mm image circle for full-frame SLR cameras.

The ED81SII, ED103S and ED115S refractors were originally designed for visual observers or photographers with an APS-C camera. However, the new SD series features new inner panels which are optimised for full-frame cameras.

The large focuser allows you to attach heavy cameras without the telescope tilting.

The telescope also comes with a folding mirror for making observations in unfavourable conditions,

as well as a T2 thread for connecting a DSLR camera.


  • Objective lenses:  115 mm 2-lens apochromat
  • Focal length:  890 mm (f7.7)
  • Resolution and limiting magnitude:  1.01 arc seconds; 12.1
  • Light-gathering power:  270x
  • Backfocus wihout Reducer: 147,2 mm
  • Backfocus with Reducer: 63,5 mm
  • Dimensions and weight:  125 x 930 mm, 6.2 kg
  • Adapter and connections:  50 mm sleeve


  • ED 115 telescope/lens barrel
  • Carry handle
  • Folding mirror
  • 7x50 viewfinder
  • Tube clamps
  • Dovetail adapter

Technical Data

Field of application
  • Deep Sky Observation
  • Deep Sky Photography
  • Lunar observation
  • Lunar photography
  • Planetary observation
  • Planetary photography
Focus Group
  • Advanced Amateurs
  • Visual enthusiasts
  • Specialists and Research
Product Family Refractor telescope
Optical design Apochomatic Refractor
ED glass
Mirror/Lens diam. 115 mm
Focal length 890 mm
Aperture ratio 7.7
Angular resolution 1.01 arc seconds
Visual limiting magnitude (approx., mag) 12.1
Type of coating Multi coated
Colour of coating green
Finderscope 7 x 50 mm
Material OTA Aluminium
Transportability very good
Colour white
Dust protection caps Dust protection caps for front lens and eyepiece holder
Mount Type Optics without Mount
Total length 930 mm
Total width 125 mm
Net weight heaviest part 6.2 kg

Product Info

Brand Vixen
Product Code X000063
Delivery Weight Package