ISO/FLUT
Use the ISO/FLUT menu to adjust ISO, FLUT®, and Shadow. For more information, see the following articles:
ISO
NOTE: To see the full range of ISO ratings, select ISO in the Upper Status Row, select Edit List, and select Custom.
NOTE: The default for Monochrome cameras is ISO 2000.
Select the camera ISO rating. The sensitivity value increments in 1/3 stops. When the ISO rating is adjusted, the camera logs the change as metadata and the monitor path reacts accordingly. Higher ISO values lead to brighter images in the monitor path, and vice versa.
RED recommends setting the ISO to the default, then adjusting the aperture, lighting, and ND filters to match. The ISO can later be adjusted around one (1) stop for fine-tuning.
Range is ISO 250 to 12,800. Default is ISO 800.
FLUT
Floating Point Lookup Table (FLUT) is an exposure control exclusive to RED. FLUT works like a traditional ISO setting, but can be fine-tuned in post production to any level of exposure precision. FLUT automatically protects highlights and shadows, even when changed substantially.
The FLUT setting is expressed in terms of relative exposure value (EV), where each unit represents a 1-stop change in midtone exposure level. Range is –8.0 to 8.0. Default is 0.0.
Shadow
Shadow adjusts the toe value of the FLUT (the tone near black). Increasing the Shadow value raises the video level of near blacks. Lowering the Shadow value crushes the video level of near blacks. Range is –2.0 to 2.0. Default is 0.0.