John, Izzie is absolutely correct in that I was being entirely too flippant with my response...
quite often a bout of cerebral-mandibular dysrhythmia (foot-in-mouth disease) rears it's ugly head.
My humble apologies my friend.
Newest method that serves me well...prefocused 180 macro lens on Canon 1Ds3,
(1/250, 100 ISO, f/32)>camera is set about 3 ft. from incense stick, which is 3 ft. from black drape>
mirror is set one foot from stick which is two feet from opposite strobe (set to maximum power),
the mirror helps calm the smoke from room drafts as well as increase light.
For me, those settings give me close to ETTR, providing smoke is in focus, using a remote shutter
allows me to watch the smoke from behind the strobe, waiting until it's within DOF.
LR>WB usually set to daylight, Clarity 35, Sharpen 100, NR 40...
PS CC>all transform tools/liquify/selections (using combination of threshold layer and color range),
and whatever else is needed for whatever...
Again my apologies...