[chrisa]

Yes, I highly recommend the MT-24EX flash. I had first that with my 100mm Macro Lens (still use this a lot as it's a really useful all purpose macro and the high mags are not always so easy to get due to having to be so close to the subject) and it makes a big difference to the images you can get, particuarly if like me you like to get wildlife / flowers on the macro. Really helps on windy days!

I find it a decessity with this lens, it means you can shoot at 1/200th sec to minimize shake and movement which at high magnification can be movement the amount of a pinhead shifting it out of focus!