Most Iray HDRI environment sets don't allow depth of field use easily and directly out of the box.

UltraHD Iray HDRI With DOF - Mansions does!

You won't have to tweak anything — all the presets are there for you to just click and render.

What you'll get is 6 ultra HD (up to 16K) custom-made environments, with or without depth of field presets.

The theme of this set is "Mansions" and offers 6 different environments at different moments of the day and different light orientations.
All these environments depict landscape with old houses and mansions from southern France. All were taken either in Dordogne or near the Charente river.

Each environment is provided in 4 different resolutions based on your needs and computer capabilities:

16000 x 8000

8000 x 4000

4000 x 2000

2000 x 1000

Each resolution is provided with or without depth of field capability, which gives you a total of 48 different possibilities.

You can also use the DOF-enabled environment and not activate the DOF of the camera for a third and different effect, so the number of possibilities increases to 72 different possibilities.

You will also get:

• 12 dome rotation presets to change the background or the sun position based on your camera point of view
• 1 DOF enabled camera preset, built especially for full-length portraits
• 2 bloom ON/OFF presets
• 8 brightness presets
• 5 shadow presets
• 6 vignetting presets

This just gives infinite possibilities!

Basically, based on your need, you click on the wanted resolution, click on the wanted depth of field option, click on the wanted dome rotation preset, and you're good to render.

Take advantage of the HDR environment speed (versus the full 3D environment that is way slower to render) with optimized depth of field!