DrPhrogg wrote:
Please forgive my ignorance because I only own 1 "L" lens, but are they not standard diameters for various filters? ND & CPL would be expensive if they required none-standard threads. What does a $640 hood do that a $36 hood doesn't? On the Canon site, both hoods read: "Designed to prevent stray light from entering the lens in order to keep unwanted glare from affecting your photographs.
Compatible with the EF 100-400mm f/4.5-5.6L IS USM lens"
Should it have read $64? ....