Most of us have always wanted to become a photographer or at least wished to learn to use an SLR or a DSLR. But get one of ’em is a huge burden on the family budget.
The CameraSim is probably the best solution you could find.
It is an essential bookmark for a photography rookie. Get started from the SLR camera explained section containing cool interactive display of how a DSLR works. It provides a step-by-step walkthrough of what aperture, shutter speeds, and ISO settings are all about. You can learn it in minutes.
The Camera Simulator is a virtual camera in which you can change all kinds of settings to reflect the image. It also provides all kinds of tool tips to help you master the device. In photography, everything starts with the light. So, keeping that at different points, you can tweak the other controls to maximize the impact of the image.