This reference manual explains the J-Log1 gamma log characteristics of GY-HC500 series, GY-HC900 series and GY-LS300, and how to use 3D-LUT files to evaluate video.
This document provides reference information for 3D-Look-Up Table (LUT) files designed to convert J-Log1 gamma characteristics recorded by specific JVC cameras into Rec.709 or DCI-P3 color spaces. It explains the relationship between J-Log1's logarithmic curve and standard display specifications, noting that direct viewing results in low contrast without grading.
The manual details two primary conversion paths: converting to Rec.709 for general monitoring and converting to DCI-P3 for cinema-grade workflows. It specifies available LUT presets based on knee characteristics (outputting 100% reflectance at 75 IRE or 85 IRE) and lists compatible non-linear editing software and grading tools.
These files convert J-Log1 recorded data to match Rec.709 or DCI-P3 characteristics so videos can be viewed on conventional monitors with correct coloration.
It is recommended to use a monitor compatible with DCI-P3 that has a white brightness of 48cd/m².
You should set the monitor gamma to Rec 1886 or gamma 2.4 for dark rooms.