This polarizer is horrible! It causes severe blurring on every camera I've tried it on. It matters not whether it's used with auto focus or manually focused this polarizer simply ruins your photos. I am at my wits end with this thing and I've experimented endlessly with this polarizer and can't for the life of me get a decent, clear shot. This shouldn't be called a polarizer it should be called a bluririzer. I guess it's true you get what you pay for, but keep the money you'd spend on this clunker an apply it to a better filter.