Focal Length	Iris	Close Focus	Weight
27	T1.9 - 22	34 cm	1700 g
37	T1.9 - 22	45.7 cm	1600 g
47	T1.9 - 22	44.5 cm	1500 g
57	T1.9 - 22	48.3 cm	1600 g
77	T1.8 - 22	66 cm	1400 g
107	T1.9 - 22	68.5 cm	1400 g
137	T2 - 22	81.3 cm	1500 g

Front Diameter: 104mm