Seems you already have one of the best kits. R5 738 gr and 100-500 1365 gr total 2103gr. Can crop to 750mm with 20 mp.
Definitely true. I am probably going to hang on to the Canon kit for local shooting and shorter trips.
The new oly om1 599gr mated with the best tele other than the 150-400 the 300f4 1270gr total 1869gr
Size smaller but weight saving only 234gr. The pro Capture feature is nice though
i don’t see the pany 100-400 985gr or the better oly100-400 1120 up to your high IQ standards.
Opinions seem split over whether the Oly or Pana 100-400 is better. I've seen enough evidence of both delivering very respectable results.
This gets into more of a philosophical question, but in my opinion, there are too many bird shooters who pixel peep. To me, getting a shot that appeals to others because it is technically good but, most importantly, visually stunning matters more than whether I can separately count every single feather tip. I see too many bird shots that are perfectly sharp and truly boring. (Sorry for rambling.)
I’m sure there will be a Zcam with R5 weight and Z9 AF soon. Mated with maybe Zmount 500pf would be interesting about 2200 gr. The current 500pf is 1460gr.
Will still be the largest and heaviest of all of them, and the most inflexible one because of its fixed FL. Being able to zoom out a little is often the only way to get a good BIF shot, unless you only shoot slow-moving birds (eagles, herons and the like).