Cor, this is my experience too. In fact the shot I was having contrast problems with was shot about 60mins before sunset with the sun behind me and the sky turned VERY dark, noticeably darker than other HIE shots I've taken (around the middle of the day). regards Peter On 9/22/05, Breukel, C. (HKG) <C.Breukel@xxxxxxx> wrote: > > I always understood/assumed the opposite: most IR light reflection in the > early hours or the hours before sunset, has something to do with the angle > the sun rays make..I am sure others can give a clear explanation