Upload & Sell: Off
Collapsible rubber hoods are useless. They don't shield much light because they aren't well shaped and they don't absorb any energy on impact with obstacles. Plastic cracks, absorbing energy. Metal deforms, absorbing energy. Rubber collapses instantly, absorbing no energy, and then the hard threaded ring transmits the energy into internal elements.
Wow, a physics expert. In your opinion, they are useless. They shield all the light that I need them to shield.
Rubber does not absorb energy. What a crock.
And in case you don't know it, the main purpose of a lens hood is to prevent stray light from reaching the lens elements, not for protection. If you want the best protection, use a protective lens case.
knock-off (plastic) hoods are cheaper and work just as good as the 'official' hoods