old project in the new version, all renderings of 1,000 samples;) msi gtx 1080- around 15min. one shoot.
These look great!
Are you using the Cycles render engine, or something else (it kind of looks like LuxRender)?
This is cycles little dof , compositing : glare and lens distortion and film color managment Rec709, look :Eastman double x neg 4min