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