I purchased this to replace the original lens hood. The hood broke in a padded Nanuk hard case after one day of travel before I could even use it. Very disappointed.

Solid fit, meant to cover and protect the lens. Original hood was damaged in a "tuck and roll" moment but did a good job protecting the glass.

On my third copy of this lens hood. Bought a new one from BH Photo right before my trip to Norway. Carried my camera gear in my photo backpack as carry on onto the plane. By the time I used the 100-400 for the first time in Norway, it wouldn't lock fully. By the end of the trip, after a few times in the daypack, it won't latch at all and loosely swivels. The same thing happened to the previous two. I'll be looking for an aftermarket equivalent, but avoid this cheap piece of junk at all costs. I guarantee this costs Sony about $3 to manufacture and they sell it for $80 only to last less than a month.