The Panasonic GX7 & Leica 45mm f/2.8 Macro: An excellent combo!
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Amazon.com : PANASONIC LUMIX G LEICA DG MACRO-ELMAR LENS, 45MM, F2.8 ASPH., PROFESSIONAL MIRRORLESS MICRO FOUR THIRDS, MEGA OPTICAL I.S., H-ES045 (USA BLACK) : Compact System Camera Lenses : Electronics
Panasonic Lumix Leica 45mm f/2.8 DG Macro Elmarit ASPH. MEGA O.I.S. Lens for MFT (Micro Four Thirds), Black {46} at KEH Camera