Excerpt: I've had this item before, for another 20mm usm lens. It locked in place. The one I just got does not lock. You line up the dots, twist it all of 1/4 inch or so, and that that. Friction holds it here, and the slightest jar turns it, first resulting in cut off corners, then the hood itself falls from the lens. Its one grade above totally useless, as I've got to constantly check it. Just a walkabout with the 5DMkII and the 20mm connected will jar it loose.
Pros: Shades ok
Cons: Does not lock in place, Easily Lost, Flimsy, Not Functional, Twists off easily
Excerpt: Used this hood for my Canon Super Wide Angle EF 20mm f/2.8 USM Autofocus Lens. Very solid and not lose like after market hoods, and useful for outdoors where there is sunlight glare. The hood materiel is very solid and Heavy, not flimsy and plastic feel like or light.
Excerpt: Great lens hood. Fits perfect on my Canon Super Wide Angle EF 20mm f/2.8 USM Autofocus Lens. Just like everyone else I just wish the lens hood would be included with the lens, but unfortunately its not. so you have to purchase it. Fits great, easy, useful. Bottom line, I would pick one up asap if you shoot in broad daylight a lot.
Excerpt: This is a must for the 20mm 2.8 canon lens Very easy to mount on lens, nice twist and lock feature. One down point that it is plastic, metal would be more durable, thought for the cost it would be made of metal?
Excerpt: As with all my wide angle lenses, I consider a hood to be a must. However, I wish the EW-75II would stay on better, especially for being such a pricey little thing! It doesn't do much to "lock" into place as my other hoods do. I am already on my second one after losing it while shooting at a recent event. Go ahead a grab it as it serves its function well, but be sure to keep a constant eye on it!