My wife noticed the way the sun was hitting the water drops from an overnight rain shower on her clothesline. I tried with the DA* 16-50, but it just did not come out the way I wanted it to, so I switched to the M 100/4 macro and this is the one that grabs me. The results from this 35 year old lens don't get any complaints from me. The white lump on top of the line is also a water droplet, by the way.
K10D, ISO 200, M 100/4 Macro, 1/180 @ f/8, hand held, shake reduction on, minimum focusing distance gives 1/2 X magnification.
and a 100% crop.