Panasonic DMW-SFU1-VLOG Lumix V-Log L Function Firmware Upgrade Kit, USA Model Version Panasonic LUMIX Log video recording (V-Log L) is now available for the LUMIX GH4, GH5 and FZ2500 digital cameras. V-Log L offers exceptional flexibility as well as wider dynamic range for color grading in post-production process. Panasonic V-Log / V-Log L were developed to feature similar characteristics to Cineon, which is a characteristic curve for film digitalization. Taking full advantage of LUMIX Four Thirds sensors, V-Log L boasts a log characteristic with 12 stops. Both V-Log and V-Log L have the same characteristic curve, and LUT (Look Up Table) can be utilized. * Not for use with international, imported, or non-warrantied non-USA version LUMIX models.