Sky-Watcher Evostar 150DX .77x Reducer Field Flattener

Sky-Watcher EvoStar 150DX .77x Reducer/Field Flattener Highlights

• 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 focuserIncludes reducer, metal thread-on caps, back focus spacer and M48 thread adapter
• Built-in 2" filter cell for mounting filters into light path