**Camera Simulator:** [**Camerasim**][1] - A simulator which allows you to experiment all modes and with different ligthing, focal length and subject distance by varying Shutter Speed, Aperture and ISO. **Lens Simulator:** [**NIKKOR Lens Simulator**][2] - A simulator for lens that allows you to experiment various focal length lenses on Full frame and crop sensors. [1]: http://camerasim.com/ [2]: http://imaging.nikon.com/lineup/lens/simulator/