These are professional type and high quality optics lens for digital camera. They have 8 elements in 8 groups and 9 elements in 7 groups for construction respectively.

• Angle of view: 3 degree/ 28.3 degree.
• Minimum focusing distance: 3.5m (11.5ft)/ 1.0 (3.3ft).
• Filter size:104mm front), 30.5mm (rear)/ 72 mm.
• With black color finished.