AVS Forum Special Member
Join Date: Apr 2002
Location: Denver, Colorado
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Gentlemen, to extract all the real detail from the GH5 image do not increase the sharpening but do decrease the NR to (-5). For low light situations, you can leave NR at the default (0).
After a somewhat rough introduction to GH5 V-Log-L, it's evident it does a good job of capturing all the sensor DR but unlike some other log formats, V-Log-L prefers not to be over exposed because the individual RGB channels do not clip together. For example, a bright sky will clip the red channel before the green and blue resulting in a hue shift to cyan. Because the shadows are so clean, you can avoid this; use the waveform display to expose the image lower, allow ample headroom for highlights and raise the shadows later in post, if necessary. This is unlike Sony SLog3, where there is more highlight headroom but shadows can be noisy because the default NR is low.
Although the DR of Sony larger sensors, A9, A7SII, A6500 (not RX10 III) is up to 1.5 stops greater, in practice it's not achievable because the 8 bit 4:2:0 internal recording limits DR to an actual 7 stops, unsuitable for HDR unless an external recorder is used. Here, the 150 Mbps 10 bit 4:2:2 V-Log-L is a tremendous advantage by allowing 10.5 stops internal recording suitable for HDR10 or HLG.
In summary, the GH5 can make a killer image through 10 bit 4:2:2 150 Mbps V-Log-L; lower the NR setting (-5), expose lower to protect the highlights and avoid the attendent color shifts. The best way to insure all of that is to shoot like a pro, full manual settings, ISO 400, 3x (0.9) ND, 1/40-1/60th sec shutter. Focus however you will :-)
P.S. avoid the iResolution setting. It's is horrid. Avoid color shifts in V-Log-L by shooting manual, turn off auto ISO. It's like two different cameras. In fact I use the Custom Sets C1-C3 to choose whether I want an action cam, 4k60p CAF, Auto-ISO, P, Photo Style Nat; or a cinema cam, 10 bit 4:2:2, 400 ISO, M, Photo Style V-Log-L, NR (-5).
HDR Colorist and Conversions
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