Now try it on a live fly
that's an impressive lens, Kev and I look forward to seeing your results with it. The DOF must be ridiculously shallow at 1:5 magnification. It will be interesting to see how much magnification you can manage 'in the field' - I've always assumed these extreme magnifications were more for studio work.
Have fun playing with it. It's a shame the insects are starting to disappear now.
Matt