Edward Woods , Aug 11, 2009; 07:02 a.m.
Alvin, I used to use amber/straw colored ROSCO gels taped to the head of my strobe with gaffers tape and depending on the situation a better beamer or diffuser over that. My newer sb800 came with a set of gels. Warming gels seem to have a nice impact on film but one I can selectively and easily add in photo shop CSII - CS IV versions that have adjustment>photo filters. As far as exposure for out door ambient lighting I seldom go below -2 on my fill flash dialed in either manually or with TTL compensation. With film and out door ambient light at -3 I could not see much of a change. On my d200 and D2X at -3 on the flash I also see a little practical effect. Galen Rowel was a proponent of using gels with fill flash for landscape to make subtle improvements and he used settings around -1.7 as I remember. Good hunting. Andy