Any way to have more control over depth of field?

I am currently working on a tv series pilot in Minecraft, and I just can't find any shader/mod that allows me to better control the depth of field. By which I mean making the camera focus on objects/areas other than those in the crosshair. I want to be able to change the center of attention by using DOF without changing the angle of camera. There's this mod which claims it can achieve that but it's for 1.7

GitHub – LoadingByte/MovieFocus: A Minecraft mod that allows for a more flexible usage of depth of field and focus in Minecraft movies. It patches supported shaderpacks so that they work together with the mod.

Any ideas about how I can find a work around for this?
I am willing to learn modding if it comes to that. Just give me some direction

Thank You.