The Panasonic GX7 & Leica 45mm f/2.8 Macro: An excellent combo!
Nauticam Focus Gear for Panasonic 45mm macro Lens
Panasonic Leica DG Macro-Elmarit 45mm f/2.8 ASPH. MEGA O.I.S. Mirrorless Camera Prime Lens 45mm f2.8 (H-ES045) + AOM Pro Bundle - International Version (1 Year AOM Warranty)