Lumen Forge

Exposure Match transfers a reference exposure to a different ISO, aperture and ND stack, then builds a bracket plan with explicit shutter times. HOW IT WORKS 1. Open Match. Enter a reference ISO, aperture and shutter speed, or capture the last available meter reading. 2. Set your target ISO and aperture. Add ND filters and adjust exposure compensation. 3. Choose a bracket count and spacing. Review each shutter time and share the plan, including long-exposure and shutter-limit flags. Exposure triangle, Kelvin references, zone notes, flash calculations, saved recipes, Field Pack and advanced tools remain available in a five-tab layout. ISO equivalence math is corrected, and the exposure triangle holds its reference while you change a setting. WHAT TO KNOW The camera meter estimates reflected scene light. Lux estimates assume an 18% gray subject and are not a calibrated incident-meter reading. ND effects use entered stop values. Brackets list shutter-open time, excluding camera delays. Verify the result with your camera and actual filters. iPhone and iPad.