David_Harry
Second Officer
United Kingdom
Offline
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The main problem with any log gamma is that you are going to record a noisier picture compared to 709 because you're not using the entire dynamic range, if the system is inherently 709, after you inevitably grade the picture to look right for 709. When I say to look right what I mean is the typical gamma levels that you'd expect when watching 709 material, black looks black not grey and white looks white not some off variant.
Most of these things usually look quite bad because most people don't have the expertise to grade. They usually end up grading and making things look crushed or blown out as they strive to make their washed out image look better with a typical 709 gamma/colour space response. I've been working in video post for over 20 years and am still to see anyone other than an experienced colourist make a grade look correct. Any time I try it just looks like a mess, because it's a job that requires a skill I don't have.
Most people are better shooting with a standard 709 gamma response as most inexperienced grades end up making a log variant look like a crushed/blown 709 anyway.
However. You also have to take on board that every version of a log curve is different from manufacturer to manufacturer. CineLike VS S-log3,2,1 or whatever, all look different, it's just someone's opinion of a log curve. Some log curves are not bad to look at, as is, and may well be a look that works without a grade. It may still look a little light at either end, but may give a pleasing mid tone detail that's worth forgoing the incorrect top and bottom.
I personally think that the Pocket's log curve is quite pleasing as is, in a certain exposure range. But that is strictly a taste thing.
Cheers,
Dave.
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