AFAIK the Deeproof adapter is the best option, but then I haven't researched for other options for some time. The one for 100mm ports
works well on the MP60. I liked the solid construction and ability to flip diopter in and out. I did use a hole on the unit to attach a "just in
case" lanyard though the unit never showed any sign of slipping off.
Jim, I used to have one of those but had forgotten where I got if from. Mine did not fit well. Had to remove the screw on the right in the pic and stretch the metal as hard as I could to get it to snap on. Brain Dead Me did not think to tie it on. It and an Inon UCL-165 now reside off the coast of Grand Cayman on the bottom. Debating whether to try it again or try something else.