Serious cutting problem with HDMI HD output a7s

I am a filmmaker from THE base and possess an a7s & package Odyssey 7 q + recorder camera.

I just noticed a serious technical problem that must be addressed. When shooting video with the A7s, the component of luminance of the HD which are sent via HDMI signals are cut to 100IRE, no matter what profile picture gamma setting is chosen. I can see it in the waveform, the chrominance information is not cut exceed 100IRE. For example, when I turn the curve of gamma slog2, exposed blue sky just before clipping has kept above blue channel 100IRE, but more balanced information clip of signals (such as a piece of white paper).

This problem does not appear in the output HDMI 4 K or record XAVC-S internal. It is true both of these formats. It is specific to flow out of the HDMI port uncompressed HD video. I'm sure that it is a firmware issue.

This conclusion came after I noticed it during a shoot and have led to extensive testing. I would prefer a real difficulty as opposed to workaround, because it cut a stop of information from the latitude to highlight whenever I have to shoot 60 p or don't want to shoot 4 K.

Apparently, it's a problem with the recorder of Odyssey is not correctly interpret the sony exposure output scaling. Convergent Design is working on a fix to include with their next update of the firmware. I see this problem on Shogun I tested.

Tags: Sony Products

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