Sky-Watcher Esprit 120ED Reducer/Flattener (.77x) (S20209)

Specifications Overview

• 34mm fully illuminated field but can handle full frame as well
• 95mm back-focus (55mm when back focus spacer and M48 ring installed)
• Drops f/ratio from native f/7 (840mm) to f/5.4 (647mm)
• Reduces exposure time by 68% compared to native f/7
• Built-in 2" filter cell for mounting filters
• 3.18 x 2.12-degree field of view when used with a full frame camera
• 2.08 x 1.39-degree field of view when used with APS-C crop sensor