Focal Length	Iris	Close Focus	Weight
18	T1.3 - 16	25 cm / 10"	1300 g
25	T1.3 - 16	25 cm / 10"	1000 g
35	T1.3 - 16	35 cm / 1'2"	850 g
50	T1.3 - 16	70 cm / 2'4"	700 g
85	T1.3 - 16	90 cm / 2'11"	1100 g

 Front Diameter: 85mm