Gadget to show off

Gadget almost irrelevant. Long to install, difficult to separate the sun visor from the filter holder ring impinges on the viewfinder and makes its use almost impossible, openwork, it brings too much light in the back of polarizing filter that is supposed to be false and then aiming. Unscrews when spinning the polarizing, conversely, may hang on the ring. very reassuring handling. Construction is serious yet but its usefulness is extremely limited. for the same price, it is worth buying a replacement battery ...