You asked

Is the sony planar t fe 50mm f 1 4 za good on aps c?

Yes, it works on APS-C. It fits a long list of Sony E-mount APS-C bodies, including the a6400, a6700 and ZV-E10.

The catch is framing. On APS-C it behaves like a 75mm lens, so it's a tight portrait lens rather than an everyday standard. f/1.4 gives roughly the background blur of f/2.1 there, which is lovely for portraits. For general walking-around shooting, I'd look at a 33-35mm f/1.4 to f/1.8 first, as the lenses guide suggests. The focal length converter shows how the crop factor changes depth of field if you want to compare.

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