Customers most agreed on the following attributes:
I finally broke down and bought the full-blooded Canon hood for my 17-55 2.8. Just as durable and functional as you'd expect (mounts and reverse-mounts easily, stores compactly, doesn't introduce significant vignetting, flocked interior), but for a higher price than seems fair. I know the 17-55 isn't an L, but would it kill Canon to include this little piece of plastic with a near-$1000 lens?
Essential to pair with your Canon EF-S 17-55mm f/2.8 IS USM Ultra Wide Zoom Lens. Accept no substitutes. Greatly reduces glare and flares in your photographs.
Nice Canon OEM quality with velour lining. Connects and disconnects easily with quarter turn. Price is ridiculously high for a piece of cheap plastic that should have come with the $999 lens.
The hood does its job - keeps out the stray light that could ruin your shot. I use it any time I use the lens. The only downside for me is the cost of the Canon hoods. After-market hoods are half the cost, but I always opt for the lens brand for peace of mind.
As with all Canon lens hoods, this bayonet mount hood is well-made, reverses for storage, and looks great. Excellent for reducing flare and protecting the front of the lens. However, because of the size of the lens and hood, it can easily block on-camera flash, causing shadows or uneven lighting.
with this good lens(17-55)of course you must to buy the lens hood!It will be need!
Much more useful for lens protection than a uv filter. Also important for flare control. Reverses easily for storage. Avoid Chinese knock-offs as they do not fit as well.