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Modern cameras have great built-in lightmeters, but sometimes taking photographs using available light(i.e. without flash or other photographic lighting) can be achallenge, especially with long exposures in low light levels orvery high intensity lighting. Fortunately in extreme conditions youcan usually use an exposure guide like this one. Simply enter yourfilm speed setting, choose the lighting conditions from the listand then see a table of shutter speed and aperture combinations.This table allows you to use a camera with manual control inconditions outside the range of the built-in light meter. The appwill also compute the Exposure Value and light level in lux. It's asimple tool to help you take good photographs in difficultconditions.

Torch (flashlight) application for Android.

Identify and record butterflies using your phone as a pocket fieldguide.

Available Light Photography Aid