Serious FPS drop when using IR View as JTAC

Hi,

When using the JTAC IR view in Combined Arms, I get a serious FPS drop, and it looks as if the game is trying to render with the depth of field option, even though I have it set to off.

Could this be looked at?

As a side note, I don't experience much FPS loss when using FLIR in the A-10C.

Steps to reproduce:

1. Jump in any Combined Arms vehicle

2. Press "B" for JTAC view

3. Enter IR view

4. Watch the frame rates drop

PC Specs:

Windows 8 64-bit

i7 3.2 GHz

8 GB RAM

1 GB NVidia GT740M card with latest drivers