Subscribe and Save!

Join our email list and stay informed about our latest sales, events in space, and guides from our astronomy experts!

Subscribe and Save!

Join our email list and stay informed about our latest sales, events in space, and guides from our astronomy experts!

  • Description
  • Specifications
  • Compatible with both APS-C and full frame sensors, APS-C (crop sensors) and smaller recommended
  • 55mm back focus
  • Drops f/ratio from native f/5.8 (420mm) to f/4.93 (355mm)
  • Reduces exposure time by 38% compared to native f/5.8
  • 5.8 x 3.87-degree field of view when used with a full frame camera
  • 3.79 x 2.53-degree field of view when used with APS-C crop sensor 
  • Includes thread-on adapter to mount reducer to Evostar 72ED focuser