best travel camera kit

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Introduction

Olympus E-M1II Sony A7III
camera price $US1799 $US2199
camera weight 574g 650g
standard zoom 12-40mm f/2.8 24-105mm f/4
Std zoom weight 382g 660g
Std zoom cost $799 $1199
Telephoto zoom 40-150mm f/2.8 70-200mm f/4
Tele zoom weight 760g 840g
Tele zoom length 160mm 175mm
Tele zoom price $1299 $1499
Ultrawide zoom 7-14mm f/2.8 16-35mm f/4
UW zoom weight 534g 518g
UW zoom price $1299 $1349
Discrete wide aperture wide angle for hand held night 12mm f/2 25mm f/2 Batis
Urban night lens weight 130g 335g
Urban night lens cost $799 $1299
Portrait lens 25mm f/1.8 55mm f/1.8
Portrait lens weight 136g 281g
Portrait lens cost $349 $999
Tele Portrait lens 45mm f/1.8 85mm f/1.8 Batis (lightest available)
Tele Portrait lens weight 115g 475g
Tele Portrait lens cost $399 $1199
Total weight 2.64kg 3.8kg
Total cost $6745 $9745
Focal range covered in FF terms 14-300mm 16-200mm
Pros better sports features, better grip, better weathersealing, MF clutches, much more focal range better Eye AF for moving subjects and animals, 1EV more shallow DOF and 1EV better IQ
Cons Selected portrait lenses and night lens are not weathersealed and have 2EV less narrow DOF, but travel is about context so this is probably not an issue; the UW zoom cannot be used with a filter; almost 50% heavier and almost 50% more expensive; there are no suitable native lens options to get to 300mm apart from the very heavy and very expensive 100-400mm lens, and any good full frame lens to 300mm will be well over 1kg - a travel alternative is to add a Sony APS-C NEX camera to give that reach with the 70-200mm lens