It was pretty dark and the car was unconveniently situated among rusty scrap iron and dry sharp branches. I brought one translucent umbrella (which I almost tore apart on on of the branches!) with light stand and the camera with 50mm along with the SB-800 and SB-600. There was a lot of mosquioes there too. Since I wouldn't be there for too long, I decided to just shoot with CLS to avoid a lot of test shots.
It was difficult to find a shooting location. I wanted to shoot the interior of the car since every thing was removed and the floor was a part of the forest floor. The 50mm is also considered a short tele lens (I didn't have the 35mm at that time) so going inside the car was out of the question.
I finally ended up shooting forward through the back window. I placed the umbrella on the left side of the car to create a bright point on the dashboard.
The setup shot:
I chose a medium aperture in Aperture priority to emphasize the focus on the dashboard.
Settings: (SB-800 on-camera was used to trigger the SB-600 slave)
SB-600: TTL +1.3
Exposure: 1/60 at f/4
Lens: Nikkor 50mm f/1.8D
The final shot: