Its been a while since I shot inside a burn building (4 years ago when I had a D3). When my fire department decided to conduct a fire behavior familiarization, for our new volunteers. I took this chance to see if Nikon's D4s can handle the heat as well as the D3. It performed outstanding!
The temp hovered around 400-600F, unfortunately the burn room was extremely small so I had to use my 14-24. The high ISO the D4s has worked in my favor since the only light source was the fire, with the occasional flashlight, There was no cosmetic damage, except it still smells like smoke! Now I just need a D5 with that insane ISO range!