So here is the setup I tried with my new Nikon D5 tonight. One candle and a small bobblehead soldier.

I also left the White Balance on Auto to see how well the camera handled the color.

You can click on the images to see them full size to compare yourself.

Nikon D5, Sigma 24-105mm f/4 DG OS HSM Art Lens, ISO 400, ƒ/4, 3 sec

Nikon D5, Sigma 24-105mm f/4 DG OS HSM Art Lens, ISO 1600, ƒ/4, 1/1.2

Nikon D5, Sigma 24-105mm f/4 DG OS HSM Art Lens, ISO 6400, ƒ/4, 1/5

Nikon D5, Sigma 24-105mm f/4 DG OS HSM Art Lens, ISO 12800, ƒ/4, 1/10

Nikon D5, Sigma 24-105mm f/4 DG OS HSM Art Lens, ISO 25600, ƒ/4, 1/20

Nikon D5, Sigma 24-105mm f/4 DG OS HSM Art Lens, ISO 51200, ƒ/4, 1/60