O-rings for Underwater Housings

By Margo Cavis When deciding on a lens for my new Panasonic Lumix GH4 camera body, I chose the Olympus M. Zuiko Digital ED 7-14mm f2.8 PRO lens over a Panasonic lens, and I have been extremely happy with my decision. I just recently started shooting Mirrorless and after years of using only high quality Canon lenses, I was a little concerned about finding mirrorless lenses that would measure up. This lens sure does!