"Cameras
All camera policies are event specific, so please call 210-444-5000 to verify prior to coming to the event. No professional camera/video equipment may be brought in for any AT&T Center event including “detachable” lenses, lenses that are longer than 3 inches or flashes. Patrons have the option to take any cameras that are not allowed in back to their car or they can check it in at Guest Services and pick it back up at the end of the event. Please note for "most" events the regular 35mm or digital/disposable cameras are allowed in as long as the lens is not detachable. This is not the case for "all" events. Concerts may have their own policy based on the promoter's requests."
AT&T Center :: Arena FAQs