Multiple cameras, depths, and image effects!

Hi everyone,
I want to apply image effects to a camera that only renders distant objects. I then want to render my foreground objects without these image effects. I want to create the illusion that the scene is rendered by one camera.

By default, without fiddling with manual render calls, render textures, Blit(), etc, my foreground camera negates any image effects applied to the background camera. Given they represent completely independent depths, both intuitively and as defined by camera depth and culling layers, this seems like it should be trivial to achieve.

Can someone please take a look and give me something specific to try? Thanks!