DOF does not affect reflections

[alessio_parolin]

I've noticed that a reflective object in front of the camera (like a plane glass) with DOF activated is still reflecting straight and clean as it is not out of focus.
you can see it from the image below.

[vladimir_krastev]

Hi this is normal - the distance to the door's corner is taken trough the reflection and not to it. So the distance between the camera and the reflected door is a lot larger than from the camera to the reflective table.
Here is a wildlife photography as an example of a water surface that reflects both blurred and sharp objects.
There is also an older tread about you question - https://forums.chaos.com/forum/chaos...in-reflections

[Vizioen]

Wow that's crazy, I didn't realize this is realistic behavior.

[vladimir_krastev]

It is not that obvious. We actually had a friendly argument here in the office.
In the end a colleague of ours Martin.Minev tested this setup in real life and confirmed that the rendered image is correct and physically accurate.

[Joelaff]

The focus distance of the lens in this case is close to distance from the camera to the reflective object + the distance from the reflective object to the door. Thus the door should indeed be in focus.

You can see this when focusing a real lens, as Vladimir mentions.

[Vizioen]

Yeah it's an interesting effect actually, but logic in a way, just never paid attention to it.