Canon YB2-5525 Lens Mount
Canon CY1-2835 AM Switch
Canon YN2-3062 Glass Cover
Canon YG2-2169 Power Diaphragm
Genuine Canon power diaphragm assembly for the EF-S 17-85 4-5.6 IS USM lenses. Made by Canon Japan. Please note. Many times the power diaphragm unit is fine, just the FPC has broken connections. We sell the power diaphragm FPC separately, here.