The Sekonic L-758DR DigitalMaster is simply the most dynamic light meter you will ever own. It can record incident or 1-degree spot-readings under ambient and/or strobe lighting down to a tenth-stop in accuracy, and it's sealed against the nastiest of weather. With the included Sekonic RT-32 Radio Transmitter Module and you can wirelessly trigger PocketWizard-enabled flash systems within a 100' range. But that's not what makes the Sekonic L-758DR DigitalMaster different from any other meter you have owned. What moves the L-758DR DigitalMaster to the head of the class is that it is the only meter that can be calibrated to read light the way the sensor in your particular camerareads light.