lost my original lens hood so i got this. the good thing is that it works on other lenses with 67mm filter threads, like the tamron 17-50 and 28-75. as far as lens hoods go, it's ok. it's pretty small, and it's not lined with felt of velvet like some lens hoods. it's petal-type, so there are cut-outs in its diameter, built of medium-strength plastic. the only reason to buy this is if you lose the one that came with your camera. you could go without it, but it does help to keep out flare in bright-light situations, and can be reversed for a trimmer fit in the bag.