Adobe Photoshop CS4 * Create panoramic images with Photomerge http://help.adobe.com/en_US/Photoshop/11.0/WSfd1234e1c4b69f30ea53e41001031ab64-75e8a.html
PhotographyJam – the photographer’s resource: Camera basics: shutter-speed, aperture and ISO http://www.photographyjam.com/articles/29/camera-basics-shutter-speed-aperture-and-iso?pg=5
What Is… Aperture? – Digital Photography Tutorial – Photoxels http://www.photoxels.com/tutorial_aperture.html