i don't really understand the first question ? but of course aperture can be set, in manual or aperture priority like in any other camera.
for focus peaking, forget about red, it's crap, go to yellow and see the difference.
https://***URL not allowed***/lockport-xt3-hdmi-port-saver-fujifilm-xt3/
man, 99€ for a piece of metal and a 5$ adapter, some people are sick.
the red syndrom probably.
you have a specific topic about xt3, you should look into it and post there.
first because you have all answers i am pretty sure and second because the answers will help the community and it is easier to have one topic that regroups all answers.
for ronin s users
https://powrig.com/products/copy-of-powrig-np-fw50-dummy-battery-for-dji-ronin-s-and-sony-a7-a7s-a7r-camera?fbclid=IwAR1kkMSTyK-_bH7mSu_sBSKzHmVAyBjAIZdDFSEHzj6LUQFE6glwlGvoNMg
i have one, canon mount. and i find the af pretty decent for a lens that old. don't excpect shooting sport with it anyway but for slow motion think it would be ok
this was entirely shot with it, manual focus
sorry, it does not serves his speach
and not saying he isn't right, just for the first 5 minutes i was almost dead bored of listening to him quoting the same sentences over and over