u painted them 1 by 1... i guess then you could alter the size of droplets so still a useful method.
i would question why you used f14 as the distance you might have been to the subject would have caught the background as well, which i'd imagine you would OOF tbh..? if you feel the lens is an issue, you can manually calibrate lens and store those settings for a particular lens/body, BUT i haven't tried it even though ive looked at numerous methods of doing this.. if u still struggle with focus and fear moving the angle of the camera, why not have an object at the same position as the lead object but higher and in the focus mark, idk. i know i used this method for doing a selfie project i did