Vello Umbra Screen Protector with LCD Shade for Select Nikon Cameras

I purchased this for the barn doors, similar to the discontinued Delkin screen shade, for use in outdoor daylight.� The protector attaches with the usual adhesive used on all protectors, but has a metal frame to which a magnet will adhere.� The barn doors have a magnet strip on the back perimeter.� Unfortunately. the magnet is not strong enough (probably not a "rare earth" permanent magnet).� When ever the camera body bumps against my chest as I am walking, the barn doors shift from position and ultimately fall off.� I have had to pick them up more than once.� I like barn doors or some other form of back screen shade -- but this one will not stay in place.� The Delkin design had tabs that would mechanically engage onto the body, and did not fall off until the plastic mechanically failed (cracked).