Hello and welcome to the forum! First, you must provide some information: 1) What iPad do you own; 2) What iOS is installed; 3) Do you own a camera adapter for your iPad (depending on its model); 4) What is the brand/model of your camera and is Wi-Fi built-in; and 5) What have you tried so far?
Second, take a look at this THREAD and at my early post for many suggestions. Let us know of this helps and please respond to my questions. Dave