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  • Compatible with both APS-C and full frame sensors, APS-C (crop sensors) and smaller recommended
  • M48x0.75 thread
  • 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