reversing the lens is supposed to give you greater magnification. for example. 200mm lens with a 50mm lens reversed in front of it would give you 4x lifesize. as far as layering 3 shots together, i don't see how you can get 3 shots of an insect before it moves. especially with the p&s "waiting" factor. you couldn't really burst if you were moving in and out trying to get different focus points.