Compare Panasonic Lumix S 18-40mm f 4.5-6.3 Lens L-Mount vs Panasonic Lumix S 20-60mm f 3.5-5.6 Lens vs Panasonic Lumix S 28-200mm f 4-7.1 MACRO O.I.S. Lens L-Mount vs Sigma 28-70mm f 2.8 DG DN Contemporary Lens for Leica L