I have an insignificant trick to share regarding PF:
Most pentax and takumar lenses do have PF, especially in highlight areas and dark background, like metal/chrome reflections.
This bike is shoot with Smc Tak 85/1.8 at f1.8. Distance and angle are selected to cover the whole bike with hyperfocal.
I shoot multiple frames this bike, with different focus point: rear part, mid/engine part and front/front wheel part.
Result from these photos reveals the in-focus areas have least PF (or not noticable).
Based on hyperfocal, one might think that the photo with focua point in the middle/engine part would be the best/sharpest.
But due to PF from the shinny metal reflections, the photo with focus point in the front wheel gives least PF (note: f1.8 is not the best property of this lens)
Then in post processing/LR, i adjust the purple color saturation to remove the remaining of PF.
Since the photo does not contain any significant purple color, it's safe.
And here is the result:
Same trick on this photo - focus on the trumpet, not the face - I also have multiple frame with different focus point.
Smc Tak 85/1.8 at f1.8. No visible PF, and therefore no PP:
Now, grab your lens and have fun