Canon EF 500 mm f4.0 L IS USM, 17/13
Canon EF 500 mm f4.0 L IS USM. Lens structure (elements/groups): 17/13, Lens viewing angle, diagonal: 5°, Thread diameter: 5.75" (14.6 cm). Filter size: 2.05" (52 mm), Weight: 8.53 lbs (3.87 kg). Magnification: 0.12x