freaky_deity : You wouldn't like the effect of the Tamron 18-200 couple with Raynox DCR-250. It's even worst with Raynox MSN-202. Too much vignetting (not sure it's the right term to it), you'll need to crop the picture to remove the dark circular framing. With the 3 lenses you mentioned, i think the 50mm f/1.8 is the only best match provided you have step up ring to 52mm filter thread.

Btw, Tamron 18-200 thread is 62mm and 50mm f/1.8 SAM is 49mm.

Kul | Mo0 : Maybe you can share us your setup? It's like one of those wedding photos, without the rings. Cool shot.

Roughly RM 250+, you can PM cjlai for this.

ahpingko Close up filter are tied to a particular filter thread size (if you buy 62mm thread, it can only use on lens with 62mm thread), where as DCR-250 is adjustable from 52 - 67mm thread.