For Landscape photography I use:
Canon EOS 5DS R (Marked: #Cxxxx)
Canon 16-35 f/4 IS USM
Canon 70-200 f/4 USM
Gitzo GT3532LS tripod
All photos are taken with SUBAL underwater housings for Canon 5D and Subtronic strobes. I use only Canon lenses: 100mm, 50mm for macro and 15mm, 17-40mm for wideangle.