3D effect on old videofilmings

[old_tv_nut]

Originally Posted by Adlershof

IO tubes had such an effect naturally (the one that produced the infamous dark halos around bright lights).

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VHS: In fact it is a surprise that people had put up with this quality at all.

The IO halo had to be suppressed in color cameras by operating below the "knee" because bright colored objects would have produced complementary-color haloes. Special IO tubes were produced for color that had a higher knee point. In monochrome, operation above the knee was used deliberately, as stated, to enhance edges while providing an approximate sort of gamma correction.

Regarding VHS quality, the old saying is "Content is king."