MalVeauX wrote in post #16703442
I wouldn't use AV. It will be hard to use in-doors, due to light, and I'm going to bet you will need lower shutter times.
Take a tripod.
Use Manual mode, ISO 100 and leave it there.
Stop down aperture based on depth of field you want.
Learn to meter so you know to do with your shutter time, to get the right exposure for your aperture.
The 18-55 would do this fine, giving you options to go wide or get in close for a singled out shot.
Take the pancake (40mm) for portraits, or thin depth of field shots.
For optimal results, this is true, but OP already made it fairly clear that he's pretty new to understanding his exposure settings.
Also, I've literally never seen anyone bring a tripod into a convention center auto show and I attend at least one a year... there's usually a lot of people in there and it'd be a massive hassle to set up a tripod for every shot, plus there's no way you wouldn't have people walking in front of your camera.
Just take the kit lens and enjoy the show, Av should work fine, or if the lighting is indeed low (as it can be in many areas in those convention centers) set your camera in M with your desired minimum shutter speed (1/15s should be fast enough if you're only shooting the cars and your hands are fairly steady, the IS on the kit lens is pretty decent from my experience, or use 1/30 to play it safe) and max aperture then leave auto ISO on, adjust your aperture/shutter speed as needed, though honestly even wide open you'll probably have enough DOF for most things you'd be interested in shooting with your kit lens and thus you'd be better off just keeping an eye on your shutter speed.
Just my $0.02. Most importantly, enjoy the show! The new Mustang took the show at this years Washington Auto Show... so sweet