When flying at 500+mph at an angle to you, that will give you more DOF,be sharpest and give you the most leeway in focusing error. If you shoot wide open then your pics will be meh.
Unless you really nail it and get the exposure/focus perfect.
I've got a lot of crappy jet photos but they get better each year.
2000 740i-Annalisa and 2008 335i-Weebl. Weebl may wobble but has DTC
2012 X5d in Sparkling Bronze ( The Ultimate Cat Carrying Machine)