The Swarovski "Silent Rubber Rainguard" is expensive, but it's a perfect fit for 42mm Leica UV, 42mm EDG, 32mm Vortex Viper, 42mm Swarovski NEU, 42mm Swarovski EL WB (pre-SV, pre-FP), Zeiss 7x42 B/GAT, and others. Easy on/off, quiet, safe. I've collected a bunch of them over the years. It's as...