A few notes about the above photo. I took as many as 7 exposures with 1.5 EV step. This was required because it was very high contrast scene with bright sun, darker water and very dark forest. I used Magic Lantern to capture those 7 exposures. Also to make exposure time a bit longer I used Hoya Neutral Density filter (ND8).
Camera: Canon 50D
Lens: Canon 10-22 f/3.5-4.5 USM
Focal length: 10
Exposure time: 1/13 s ("middle" exposure)
Number of exposures: 7
Step: 1.5 EV