User Manual

 Exposure: Increases or lowers image lightness in units relative to ASA values. If your
intended exposure adjustment lifts image data above the maximum white level, don’t
worry; all image data is preserved and can be retrieved in subsequent adjustments.
160is unity. The range is +160 to +3200.
 Finetune Red: Advanced debayer setting.
 Finetune Green: Advanced debayer setting.
 Finetune Blue: Advanced debayer setting.
ARRI Media and Log-C
ALEXA media is usually recorded using Log-C gamma and color processing, which is
very similar to the Cineon Log gamma curve, developed by Kodak to produce
flat-contrast, wide-gamut image data that preserves image detail with a wide latitude
for adjustment. There is no ALEXA raw parameter to adjust this, so for Rec. 709
monitoring and deliverables you need to “normalize” Log-C clips in one of three ways.
You can use Resolve Color Management (RCM) to automatically normalize
log-encoded media according to the type of media it is.
You can create your own adjustment to normalize Log-C clips as part of the grading
process, using the parameters of the Color page. This approach gives you the most
flexibility, as you’ll be making custom settings that maximize the image data that’s
available in every scene.
Alternately, you can use a LUT to normalize Log-C clips to obtain a fast starting point
for additional grading. Used in this way, LUTs can be applied either as an output LUT,
ifthe entire Timeline is nothing but ALEXA raw media, or as a LUT that’s applied to an
individual node of a grade, if you’re mixing ALEXA raw media with other formats. This
provides a fast and easy solution to linearizing ALEXA media that can be useful for
creating dailies for offline editing. However, one LUT may not be suitable for all clips.
Ifyou’re applying individual LUTs to each clip, you can create multiple LUTs, each with
differing contrast settings, in order to gain the speed benefits of using LUTs, while
taking into account the individual differences among clips.
ARRI has a LUT generator available online that you can use to create
custom LUTs for use with a variety of color correction applications at:
www.arri.com/camera/alexa/tools/lut_generator.html
Blackmagic RAW
A raw format developed by Blackmagic Design and used by a variety of Blackmagic cameras.
This format relies on the increased processing capabilities of modern cameras to perform a
certain amount of in-camera pre-processing (including noise management, sensor profiling, and
edge reconstruction) to partially de-mosaic the image and then re-encode the result, factoring
in the characteristics of the originating image sensor. The image is encoded in such a way as to
later enable typical raw controls but with efficiently compressed files (using a custom non-linear
12-bit space) that are not computationally challenging to decode and use. BRAW media can be
encoded at either a Constant Bitrate (with variable compression of 3:1, 5:1, 8:1, and 12:1) or at
Constant Quality (with a variable bitrate).
Chapter – 5 Camera Raw Settings 177