I’ve just gotten a Canon 800D/T7i and I'm having issues using it. Sometimes when I try and take a photo it won’t let me. Can someone tell me why? What’s the best mode to be taking photos in?
Are you getting focus lock? Some cameras won't allow you to take a shot if focus isn't locked. This can happen if the subject is too close, it's moving, or trying to focus on an area lacking contrast. There are settings in the camera's control menus which will allow you to take a shot if focus isn't locked.