camera focus bad

Dear valued customer,

Thank you for contacting Samsung Levant support 
we appreciate the chance to assist you
kindly check the following please  :
1. make sure that your software is up to date
2. make sure that all of your apps are up to date
3. check the lens of your camera that its clean
4. go to settings > apps > camera > storage > clear data and cache
5. go to apps > camera > settings > reset settings

if that did not work try to reset your device to factory settings but that will delete all of your data
otherwise, kindly refer to the nearest authorized service center in your country