I bought one of those reversing rings on ebay, so you can whack your lens on backwards and use it as a macro. Also bought an old 50mm 1.8 lens, so I've been using that with it. Just had a little play so far; here are the best results so far.

Some of my pictures are now available for sale at SerenityPhotography.co.uk in a variety of sizes or finishes, or as digital files for use as royalty-free stock.