0.75x RiDK Reducer

0.75x RiDK Reducer

a 3 element reducer for RiDK Officina Stellare astrographs

Specifications

  • FOCAL REDUCTION
  • 0.75x
  • LENSES NUMBER
  • 3
  • CORRECTED FIELD
  • 42mm

Designed from our master optician Massimo Riccardi, this 3 lens design reducer will bring your powerful f/7 RiDK down to f/5.25, increasing wide field and keeping the same – tiny – star’s shape.

It’s fully corrected for a wide field of 42mm. A KAF 1680X chip can be used anyway, with a small amount of vignetting and quality decrease on the extreme borders. It’s fully diffraction limited from 450nm to 730nm