The basics of photography are not so, well, basic. Between aperture, shutter speed, and ISO setting, capturing the perfect picture with a DSLR outside of the automatic setting is a challenge. Enter the Master Your DSLR Camera iPad app ($10).
It may cost a bit more than your typical tablet app, but think of your sense of accomplishment when you can actually wield that SLR camera like a pro. The slideshows, guided tours, and list of common photography scenarios ensure you'll retain the how-tos, unlike trying to follow complicated technical jargon. With this app by your side, you can count on finally using the correct light and shutter speed settings to warrant major compliments on your vacation photos.