I am wondering how people get those beautiful newborn shots (especially) with the blacked out background? Do I NEED a black background? What is a likely ISO range for indoor newborn shots with natural light? (obviously depends on the amount of light but I was surprised to hear people going up to like 1600 ISO, would that not be too noisy?) Would my 50mm 1.4 be a good lens to use? (but at f/4 or something for clarity of the face?) Thanks in advance!