Hi, when i take panning shots at around 1/50 at f4 from some cars in some shot the front of the car is very sharp while the rear is just motion blurred a whole lot. at the moment i can’t make 1/40th work, i do get some good shots but this issue has persisted for the past little while. for reference i shot around 2k panning shots in that past 2 months and around 100-150 keepers.

are there any suggestions for taking better panning shots of cars like settings?

are there any tips on how to make lower shutter speeds work? specifically when you see a ridiculously smeared background(like 1/10 second shutter) on a photo is it tool assisted?

and to make sure what is a normal keeper rate for you guys so i know how much i need to improve my technique.

any help would be appreciated thanks.