Has anyone used a Raynox MSN-505 super-macro lens, and if so what results have you got? I've got a Canon Powershot S2 IS which already has a good macro and super-macro mode but I was wondering if this lens would give me greater magnification as I want to take really close up shots of insects etc. I've read a review which recommends the Raynox DCR-250 but as this new lens offers greater magnification I was wondering what results it gives.