ARRI ALEXA Mini LF Ready to Shoot V-Mount Set (LPL) - Manual (Page 62)

Look Settings 62
REC 709 Material recorded in Rec 709 (short for ITU Recommendation BT.709) has a
display specific encoding. The purpose of a display specific encoding is to im-
mediately provide a visually correct representation of the camera material,
when it is screened on a certain display device. This is achieved by mapping
the actual contrast range of the scene into the contrast range that a display
device can reproduce. Examples of display specific encodings are Rec 709
for HDTV screens or DCI P3 for Digital Cinema Projectors. On the downside,
a display specific encoding puts some limits on the options for a colorist.
REC 2020 Rec 2020 is a wider color space than Rec 709, which is the current industry
standard for HD. Rec 2020 promises more brilliant images, though only new
display technology is able to show these. Traditional Rec 709 displays (like
TVs or ordinary computer displays) can not display Rec 2020.
While Rec 709 is the encoding color space for HDTV, Rec 2020 is the encod-
ing color space for UHD. The primary colors lie on the spectral locus and it
is thus possible to have more saturated colors in images. It does not mean,
however, that all colors look more saturated. When properly converted, Rec
709 images will look exactly the same when displayed on a Rec 2020 dis-
play. Rec 2020 is an encoding standard. A TV or display may not support the
full gamut. Nevertheless, it will correctly display the colors within its physi-
cal gamut. To get the “Premium” logo of the UHD Alliance, for example, a TV
needs to support a minimum of 90% of the P3 gamut.
2. Select the desired color space.