Lens Construction (elements/groups): |
Extension Tube EF 25 can be used with EF lenses except the EF 14mm f/2.8L, 15mm f/2.8, 20mm f/2.8, 24mm f1.4L, 50mm f/1.0L, 17-35mm f/2.8L at the shorter focal lengths, 20-35mm f/3.5-4.5 at the shorter focal lengths, TS-E 45mm, and lenses which cannot be focused manually |
