Sky-Watcher Esprit Flattener for 150 EDX - S20219 100 mm Refractors These eyecups are covered with

These eyecups are covered with soft rubber end pieces to provide comfort and safety when contacting your glasses or your face

The Askar 91F is a self-flattened design that allows users to avoid calculating the back focus and buying additional flattener

to produce images with low read noise and high dynamic range

Attach the focuser body to the coupler

Sky-Watcher Esprit Flattener for 150 EDX - S20219 100 mm Refractors These eyecups are covered withAdd this two element field flattener to your Sky Watcher Esprit EDX 150 to achieve edge to edge field flatness and an image circle of 44 mm. Field Flattener or Reducer? Flattener Thread On or Insertable Thread On Corrector Thread size M65x1 female M62x1 male Corrector Back Focus 96mm Corrector illuminated field 43mm Corrector adapter needed? Yes (Included with telescope) Corrector allow for 2" filters? Yes