Everything I expected
Purchased this filter for my 50mm f1.2 lens. It goes without saying that after spending a hefty amount on a lens that has been nothing but amazing to me, I'd want to protect it and the Canon 72mm UV Haze Filter does just that. It fits on very effortlessly and does not distort my photographs in any way.

Must Have
The most little tool that you must have before you go outside taking picture! and it also protected your lens from scratches. Well done Canon!

You get what you pay for when you buy a filter
First of all, I'm a big fan of buying a UV filter for your lenses. Not only does it cut down on the UV light and makes the colors pop, but it's also insurance against damage to the front element to the lens. The last thing I want to do on a 00 lens is have to worry about the front getting scratched or damaged, so I'd rather buy a - piece of glass to protect it and consider it disposable.

Having said that, with filters in general, you tend to get what you pay for. You might want to consider something more expensive like a Hoya or Tiffen. They're better constructed and don't feel as flimsy as the Canon UV filters.

I'd recommend picking it up - if you get a good copy, then keep it. But if you get one and it sucks (your images seem soft or the UV filter itself seems poorly constructed), then invest an extra few dollars in a better filter. I mean, you've already dropped 0+ on a lens, so what's a few extra dollars? (as the guy at the camera store tells me all the time...)

Not the Best Filter Out There
I purchased this filter to protect my 35mm f/1.4L. This filter, depending on the conditions, reflects a horrendous amount of light. I bought a b + w multi-coated uv filter for my 16-35mm f/2.8L. It costs a lot more but it is well worth it. I had to try pretty hard to get it to reflect any light and when it did it was hardly noticeable. I'll be replacing my canon filter with a b + w.

Canon 72mm UV Lens
Does exactly what it says. I might consider a cheaper manufacturer, but... then again I didn't this time. I own UV filters that work fine, And I haven;t noticed the difference in the "Haze" part. But maybee it is working so well, I just take it for granted. Either way, in my opinion worth every penny to avoid scracthing 0+ lens' but you could get a sub UV filter that covers the basics. I would buy this again!!!!