I love doing macro photography, and have done it for a couple of years now. I just got a new camcorder with a 30mm thread, and would like to attach my Raynox DCR-250 lens on it, which has a 43 mm rear thread. There's no 30mm to 43mm step up ring, so would it be ok if I use two of them? A 30mm to 37mm ring, attach a 37mm to 43mm ring on top of that and finally attach the lens? I'm basically worried that the increased distance from the camera's lens (about 1.5 cm) might have a negative effect. I'm not too worried about vignetting, since I'll probably never use the lens at a wide setting. Anything else I should keep in mind?