GH4 Confused on VLOG and Zebras on the Atomos series

[TheTrickster]

I'll admit, I purchased the vlog upgrade for my GH4, never used and now having a look at again, due to the pending HLG updates to the FLAME series - but I'm confused.

From my understanding everything above 79IRE will clip, if looking at native log footage using the builtin GH4 zebras or the ones on the Ninja (if in Native Source Video mode), however (I assume?) if I set it to 'LOG to Video' and specify its a Panasonic camera, VLOG and VGamut - I would assume the on-screen exposure tools would be using the converted (to REC709) footage for the Zebras (so I can now use 105% for seeing whats fully gone etc) however it seems to me that the zebras are using the source LOG for the exposure so I'm getting zebras all over the place, even if my scene is correctly exposed and nothing is overexposed.

I know I'm doing something wrong - but any ideas?

 

[Cary Knoop]

From my understanding everything above 79IRE will clip,

No, there will be spikes above that, it will only clip at 79 IRE at full sensor saturation.
Make sure you record with data levels not video levels.

Using a LUT to check exposure I think is a bad idea unless it is a false color LUT.

 

[TheTrickster]

I’m using the built in Log to REC709 ‘view’ on the Flame and the zebras for making sure I’m not over exposing anything I don’t want. But setting zebras to 100% in this mode, almost everything white is over and yet the RGB Parade isn’t above 80 either