I used macro lens with flash. from experiance, if flash hit the drops photo will not look good.
Camera Info
Device: Nikon D80
Lens: 60mm f/2.8D
Focal Length: 60mm
Focus Mode: AF-A
AF-Area Mode: Dynamic
VR:
AF Fine Tune:
Exposure
Aperture: f/16
Shutter Speed: 1/200s
Exposure Mode: Manual
Exposure Comp.: 0EV
Exposure Tuning:
Metering: Spot
ISO Sensitivity: Auto (ISO 320)