So I really admire the ir shots I have seen. I really want to be able to do some. I am hoping someone can answer a couple of questions I have about them. 1). I have read that not all cameras can be used for ir photography. Is is true and if so is there any way to know? Are there some cameras that are best to use? 2). I see that some convert cameras to do ir and some just use filters. Does one block more other types of light? What is the real benefit of one over the other?