The 401-475 is a Sekonic L-478DR-U-EL light meter for the Skyport wireless trigger system. Measure, compare, and trigger lights all from a large, intuitive touchscreen display. Built-in radio power control and triggering for the 2.4 GHz Elinchrom SkyPort wireless system. Trigger, take a meter reading, and adjust the power of Skyport equipped lights with-out ever leaving your subject. You now have the ability to control power on compatible Elinchrom strobes in 0.1-step increments. Measure and assign lights across 20 channels and 4 groups with measured values maintained so you can determine ratios and build looks. Hybrid shooters can use these settings to gain access to frame rate selection from 1-1,000fps as well as shutter angle settings from 1-358° as well as ISO 850 for Canon cinema cameras. Enables the meter to account for filter factor, which can now be done at up to 12 EV for landscape shooters using high-density ND filters.