Focal Length: 28mm (1.10″)
Apparent Field of View (deg): 56°
Eye Relief: 20mm (0.59″)
Eyepiece Barrel Size: 2″ (51mm)
This eyepiece allows for 20mm of eye relief for viewing comfort, making them especially desirable for observers wearing eyeglasses. The rubber eye-cups are included to keep out extraneous light. Apparent Field of View is 56 degrees.