Camera Simulator
Camera Simulator App
Here's an app that lets you change shutter speed, aperture and ISO just like you do on your DSLR. Have a go at changing the settings and see if you can get a variety of exposures showing motion blur and depth of field.
CameraSim
Consider CameraSim Pro your virtual DSLR camera. Take photos in various environments and times of day without leaving your computer. This immersive tool allows you to gain a deeper understanding of how controls are affected by different variables. Learn how everything works before investing money in equipment!
Open the app Here
Cannon Play
Play with the camera controls found in the "Creative Zone" of an EOS Digital SLR. Here, you can really dictate the outcome of your photos and get the effects you want. Your shots will appear below where you can review, get feedback and compare the settings you used.