Thanks for the links. Conversion factors for speed boosters in APS-C and 4/3 sensors rob me a bit in the wide end. Do we have a table linked to this forum for showing the different angles of view when choosing speed boosters?
I took a Sony RX100 mk iv 4k to Thailand just recently and travelled with it really well,sold it as soon as I got back- but the 4k output from something the size of a cigarette packet is quite something else.
Equivalent 20mm FOV in 35mm terms is my minimum for panning and lensing in tight areas.
Got to admit 5d series works well in colour,battery life,menu's,accessories,etc,etc.
Changing bodies might curb the horrid RAW demands of ML.(Looking at 4k versus h264 from Canon is a joke even from a quick shoot with the tiny Sony).