Shaped Lens Hood

Shaped Lens Hood
What is the difference between a petal hood and a standard lens hood?

I know that is a difference I mean is there any difference between the two when an image is taken

The idea behind petal shaped lens hoods can be expanded without causing bullets. Should provide greater protection against a side wall of a conventional one. Chris

Snapshot: Compact versus DSLR (Part 4 of 5 – Speed and Sensitivity)