Nothing wrong with the lenses suggested by Chris, but you might be want to consider the Nikon 105mm F2.8 VR and Greys of Westminister have one for £549. OK it's a bit more than you wanted to spend but it's worth every penny. I have both the Nikon 60mm F2.8 macro and the 105mm F2.8 VR which I use with either 1.4 converter or2x converter both of which give great results.Converters wont work with the Nikon 60mm F2.8 Macro. VR make a big difference when photographing insects and butterflies in the wild, and although you could used a tripod, by the time you have set-up the subject has gone. Check out other secondhand camera sites as they might have a 105mm F2.8 VR macro for about £400.