Inexpensive exposure meter that is worth its price. The only problems are: 1 - the readings shift upwards within a few minutes and 2 - there is no calibration certificate whatsoever. A NIST certificate would be quite expensive, but a reference to the calibration would be nice. I compared this room lighting stability instrument alongside my International Light Photometer. The Extech drifted significantly more than the other meter. Again, it costs many times more and is portable.
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