The HVF37 is a rectangular piece of nylon with rigid foam inserts that has Velcro position so that you can wrap the hood around 3" - 7" viewfinders to make a viewing tunnel. Many TV sports shooters use the HVF37 to hold a magnifying lens in place for improved viewfinder optics. Install a Hoodman Hood on your camera monitor to cut the glare and increase LCD visibilty in brightly lit shooting environments.
