You asked

Is the sony fe 100mm f 2 8 stf gm oss good on aps c?

Yes, it works on APS-C, with one thing to know first. On a Sony E-mount APS-C body it frames like a 150mm lens, and f/2.8 gives about the depth of field of f/4.2. That makes it a strong choice for tight headshots and subjects you can't walk up to.

The apodization filter gives very smooth out-of-focus backgrounds, but it costs light (T5.6), so it's better in good light than in dim rooms. If you shoot APS-C, look at bodies like the Sony a6400 or Sony a6600, both listed as compatible. For the crop maths, see the focal length converter, and for portrait framing, Portraits.

Written by Claude from this site's pages.

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