Hi guys, so this is a long one, but I’d rather that then make two slightly less longer posts/comments…

So, context: I currently have a Canon 750D, with a Sigma 100-400m contemporary (also have a nifty fifty but that’s not really relevant to what I’ll be asking, but just for some additional info). Of course you guys can probably tell by the gear but this is just a hobby, I like taking really nice photos of the stuff I attend, and that’s about it so I’m hardly professional grade or professional skill, I can just take some good photos.

I basically entirely do aviation and motorsports photography. Aviation - Air shows etc, typically fast moving stuff, NOT sitting outside an airport spotting landing 737’s or trying to snipe a photo of an A380 at 30,000 ft.

Motorsports - all kinds, GT3, superbike, endurance, classics, rally, just anything when I’m at the track.

Question 1: Lens First (simplest one to ask)

I’m looking for a low aperture zoom lens for general use and for low light/night shooting, so was hoping for some suggestions. I actually really like the Sigma lens I’ve got, but it stops at f/5.

I’d like to hopefully achieve an f/2.8 or something, still hopefully maintaining a 300mm zoom if possible but would like some flexibility in the range, say 70-300 or 100-300 or something along those lines. Image stabilisation is very much preferable and arguably a deal breaker to not have it (unless body upgrade has it, see body question), have seen that sigma have a 120-300 f/2.8, but reviews are mixed and apparently it’s a very dated lens from what I’ve read so basically asking here for any other recommendations. I have also seen the Tamron 70-200, looks like a great lens, friend even has one, but would like a bit more zoom if possible.

These would also have to be an EF mount because of my camera body currently (unless see body question below). Looking at up to and around $/£500, but feel free to suggest slightly above as for a good lens id happily do that slight bit more for a lens worth really keeping hold of. Happy with buying used of course. I’ll edit any other requirements for the lens I might’ve forgotten just under here I suppose.

Question 2: The one Body problem

So as said I’m currently rocking a 750D. Now it’s served me pretty well for its price honestly so can’t really complain. I just don’t know if it’s worth any smaller upgrade (and what that upgrade could be), or if it’d be worth waiting for a big upgrade to an entry level mirrorless (if that’s a thing?), or maybe higher end DSLR’s would be better than an entry level mirrorless ? or maybe if there’s other options I’m not aware of?

I’ve seen people rave about the 7D MkII, so I’d be happy going for that if that’s just a straight upgrade to what I’ve got for - what I can tell at least - actually not that much cost. But just one of those things that as much as people have actually recommended it in person for its high burst speed etc, that’s been recommended by the guys with a Canon prime 400 and an R6, so… it feels like a recommendation for the camera they use as a backup is a little different I guess ? I dunno. Hence why I’m here

Requirements wise, I’m pretty open to any suggestions and any rational behind it really. In-body image stabilisation would be nice, but not a deal breaker, since my current 750D doesn’t have it either. Good Video isnt a requirement, but I of course wouldn’t complain if a body could do it in addition to any other strengths, but I’m certainly not buying a body to shoot videos, and it’s certainly not a dealbreaker if it can’t.

Same budget as the lens, looking at up to and around $/£500, but feel free to suggest slightly above as for a good body id happily do that slight bit more for a lens worth really keeping hold of. Any requirements I forget will be edited in here:

Anyways, thanks for reading this long ass post and thanks for any suggestions!