If you go down this path, I'd recommend the attachment version which I plugs into the iPhone/Android device. Although it doesn't cater for flash, a lot of people may never use this so it may not be an issue. The cost is pretty cheap in comparison ($100 for the light meter attachment and the app is generally free) and at least you know you are getting an accurate reading. The tests of the one I listed were considered to be pretty accurate.


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