Focal Length & Maximum Aperture: 8-15mm f/ 4.0
Lens Construction: 14 elements in 11 groups
Diagonal Angle of View: 180 degrees
Focus Adjustment: Lens extension via inner focusing and focus cam plus floating mechanism
Closest Focusing Distance: 0.16m / 6.2 in.
Filter Size: Rear Gel Holder (accepts up to 3 pre-cut gel filters)
Diameter x Length: 3.1 x 3.7 in / 78.5 x 83.0mm
Weight: 540g / 19.047 oz