When going through security, you'll need to take your camera out of your bag and put it in a bin, just like you would with your laptop or liquids. Don't worry, the TSA agents are not going to make you delete any of your precious photos, they just want to make sure you're not hiding any prohibited items in your camera case. It's like when you're trying to sneak a snack into the movie theater, they just want to make sure you're not breaking any rules.
If you have a mirrorless camera or a DSLR, you might get a few extra questions from the TSA agents, but that's just because they're curious about your fancy equipment. They might ask you to turn it on or take a few pictures, just to make sure it's really a camera and not a disguised weapon. It's like when you're at a party and someone asks you to show them your camera, you're happy to oblige and show off your photography skills.
How To Bring Film Camera On Plane at Lilian Dixson blog
