Sky-Watcher 0.77x Reducer/Flattener for EvoStar 150DX (S20208)

Sky-Watcher 0.77x Reducer/Flattener for EvoStar 150DX

• 34mm fully illuminated field, compatible with both APS-C and full frame sensors
  
• 89mm back-focus (55mm when back focus spacer and M48 ring installed)
  
• Drops f/ratio from native f/8 (1200mm) to f/6.2 (930mm)
  
• Reduces exposure time by 66% compared to native f/8
  
• 2.22 x 1.48-degree field of view when used with a full frame camera
  
• 1.45 x 0.97-degree field of view when used with APS-C crop sensor
  
• Only compatible with Evostar 150DX focuser
  
• Includes reducer, metal thread-on caps, back focus spacer and M48 thread adapter
  
• Built-in 2" filter cell for mounting filters into light path