Since its introduction, Sekonic's L-358 Flash Master has become the best-selling digital flash meter in its class. Weather-sealed against the nastiest of working conditions, the L-358 delivers dead-nuts accurate flash and ambient light reading in both incident and reflected modes.For mixed lighting scenarios, the L-358 displays the combined exposure values of both flash and ambient light sources, including the percentage of flash in total exposure in 10-percent increments. Dual ISO buttons allow for quick exposure factoring when working with two differing film speeds, film and Polaroids, or other situations where comparison readings are desired. From the Manufacturer L-358 FlashMaster The Sekonic L-358 displays an f-stop range of f/1.0 to f/90.9, and a shutter speed range of 30-minutes to 1/8000th-of-a-second (1/1000th in Flash mode), both of which can be displayed in full-, half-, and third-stop intervals to mirror your camera's exposure display. When set to "full," the exposure is displayed in tenth-of-a-stop increments with repeat accuracy of +/- 0.1 EV. For motion picture applications, the L-358 calculates cine readings from 2 to 360 frames-per-second. As with all Sekonic meters, the Sekonic L-358 Flash Master includes a 3-year warranty and the best customer support you're ever likely to find. The simple solution to creative light control with optional wireless triggering Directional light is powerful. It guides the viewer, creates mood, and adds dimension, depth, and texture. If you want to create a signature style that elevates your photography to the next level, the mastery of off-camera lighting should be your next goal. Subjects – clients – are not impressed with a shoot, view, and adjust photo style. Lighting ratios, ambient balance, and final exposure must be set confidently. Knowledge and use of the tools of photography assure that the outcome is the intended one. And for images like this one, the Sekonic L-358is the professional photographer