I converted from full frame to Olympus M43 in early 2018 and I now shoot exclusively with OM System / Olympus cameras and lenses.  I am incredibly happy with my OM gear, which is light, ergonomic, and intelligent™. My current kit list is as follows:

Camera bodies & lenses

• OM System OM-1 II & Olympus OM-3 bodies
• Olympus 150-400 f4.5 Pro lens my go-to wildlife long lens
• Olympus 300mm f4 lens light, razor sharp and ideal for travel
• Olympus 12-100 f4 Pro a high quality one-lens-does-it-all go to for landscape / travel 
• Olympus 90mm f3.5 macro lens – up to x8 life-size with the MC-14 / MC-20 converters
• Olympus 60mm f2.8 macro lens + extension tubes – ideal for travel
• Olympus MC-14 & MC-20 extenders

Ancillary equipment

• DJI mini 4 Pro drone & RC-2 controller

• Manfrotto 15L Beefree backpack for macro – takes all my macro gear so I can pick pick it up and go
• Temba 10L backpack for drone
• Billingham Hadley Small Pro bag -light, small and perfect for urban travel

• Gitzo GT2531EX carbon tripod for fine macro work plus Arca Swiss Monoball P0 head – a stunningly engineered combo
• Benro Cyan-Bird carbon travel tripod with FS20 head this is astonishingly light – its 1kg and rock solid.  I’ve used it with my 150-400!
• Manfrotto 290 carbon monopod paired with with a Three-Legged-Thing Airhead – a fantastic combo with the 150-400 f4.5

• Cognisys Sabre laser trigger – for bats-in-flight
• Cactus RX60x flashes and stands – for bats in flight
• LED panel lights, brackets & clamps for macro work