Luxi clip-on iPhone light meter released to public

Now on general sale: the $30 adapter that makes an iPhone into an incident exposure meter.


Luxi, the clip-on adapter that turns your iPhone into an incident light meter, is now on general sale to the public. The product was previously available on Kickstarter and up for pre-order but now anybody can get their hands on one.

The attachment, which is made of plastic, fits over the front or rear-facing camera on your iPhone and, by way of an app, takes incident light readings using the camera sensor. It displays results much like a dedicated, professional exposure meter.

As it takes incident light meter readings and not reflected light readings (like a camera’s built-in meter does), the Luxi doesn’t get confused by backlit or high contrast scenes.├é┬áSo it’s handy for film, landscape photography and video, though not much good if you want to meter a studio flash because it only measures continuous light.


The Luxi is available in two versions for iPhone 4(S) and iPhone 5(S) respectively. Each costs US$29.95 from the Extrasensory Devices web site. The Luxi App is free on iTunes.

David Selby
David is a keen photographer and has been editor of Lighting Rumours since 2010. When not writing about lighting, he works as a data scientist at the University of Manchester, UK.