Luxi can turn your iPhone into a light meter, which is an instrument used to measure the intensity of light. In photography, a light meter is used to determine the appropriate exposure time. When the sensitivity and shutter speed are known, the light meter gives the aperture value for obtaining the best exposure. Luxi helps you determine the best settings for your SLR camera or other cameras through the front camera of iPhone and special applications.

It is believed that many professional photographers will use light meters to assist in shooting. Professional light meters often cost hundreds of dollars or more, and there is no Luxi that can be directly attached to the iPhone for easy and fast use. Moreover, Luxi's accuracy of aperture size and shutter speed is better than the camera's own light metering system. Compared with the simple light meter application on the iPhone, Luxi can capture light at an angle of 180 °. If only the iPhone camera is used, it can only receive light at a limited angle.

Install Luxi on the camera of iPhone 5

Photo effect after Luxi metering

Compared with the professional hand-held light meter, the tested Luxi has the following performance comparison results. The figure below shows the comparison between Luxi and the relatively low-end SEKONIC L-308 hand-held light meter.

Comparison Results of Luxi and SEKONIC L-308 Light

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