System Information
Windows 10 Pro (Dell XPS Laptop)
1050ti NVIDIA

Blender Version
Blender 2.81

The depth of field in Eevee has a strange "falloff" behavior. The transition from blurry to in-focus is often too quick. The Cycles depth of field behavior does a great job mirroring real cameras, the Eevee depth of field transitions way too quickly, there is often barely no transition at all.

Exact steps for others to reproduce the error
Any render that requires a shallow depth of field.

Compare Eevee to Cycles