this one is some thing new i never tried
here are some shots i tried today,
*u1.ipernity.com/33/49/23/23364923.25df6d17.640.jpg
SX150is , f5 for 1/160th of sec from 249mm focal length (35mm eq) when iso was 200 and white balance was cloudy.
*u1.ipernity.com/33/47/41/23364741.1ccab067.640.jpg
SX150is , f5.1 for 1/45th of sec from 225mm focal length (35mm eq) when iso was 200 and white balance was daylight.
*u1.ipernity.com/33/85/09/23378509.8780c1a8.jpg
SX150is , f5.1 for 1/60th of sec from 241mm focal length (35mm eq) when iso was 100 and flsah fired- true.
adding an nonelectrolyte like sugar makes the drop much stable but again some good surface for adhesion is equally important.
i think more refinement is possible to what i did, i ll try some more shots tomorrow when there is good light with some asters.