Cavision Combination 0.5x Wide Angle Auxiliary Lenses for 77mm Thread Lens

The Cavision LWA05x77 is combination of two lenses (the BWA07x95 and LWA07x77). The combination of the two 0.7x factors makes it a 0.5x wide angle. Since it's intended for a 77mm thread, the rear portion of it (LWA07x77) can also be used separately as a 0.7x on a lens with 77mm thread. The BWA07x95 is also a wide angle adapter but it can't be used separately (because it doesn't have a 77mm thread).