The Canon 11-24mm filter holder is a dedicated Canon 11-24mm holder. The filter size is 6.7 x 7.5 inches (170 x 190 mm), 6.7 x 6.7 inches (170 x The wide rubber area to hold the filter and the sturdy design ensures that the filter will not move and fall down. Vignetting occurs in 0.4 inch (11 mm) and 0.5 inch (12 mm) ranges. The practical level is compatible with 0.5 - 0.9 inches (13 - 24 mm).