Will turning off and delete photos via icloud preferences on macbook delete my iphones photos?
Solution 1:
No, the pictures will still be available on your iPhone if you click Turn off & Delete. The images will then be deleted from iCloud within 30 days.
No matter what, I would definitely make a backup of preferably both your iPhone and the Raw photos/videos e.g. to an external hard drive to ensure even if something goes wrong you don't lose your data.