@ShinySideUp I'm now blaming you Martin for my purchase of a new macro lens! I realised that my old one, the Sigma 105mm f2.8 EX D doesn't have the stabilisation and is a bit less than optimal, so I've bought the EX DG OS version as it seems to be the best suited to my needs. I'm sure the old one might be ok for steady hands or tripod use, but I don't have the steadiest hands it seems, and rarely have the patience to set up a macro shot with tripod. I suspect I didn't need much persuasion to make this purchase in truth, I've had a few issues with the old one hunting a lot for focus when used as a portrait lens, so I hope the newer model is better.