Focal Length & Maximum Aperture
15mm 4.0

Lens Construction
14 elements in 11 groups

Diagonal Angle of View
180°

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)

Max. Diameter x Length, Weight
3.1 x 3.7 in, 19.1 oz. / 78.5 x 83.0mm, 540g