Friday, September 28, 2012

Nikon D3100 stops taking pictures long exposure?

I am taking 30 second exposures of star trails with a nikon shutter wire release.It will take the 30 second pictures over and over but, I come back after 3 hours and the camera stopped taking pictures after about an hour.Is there a setting I can change to fix this?
Added (1). Battery works fine.
>>> Nikon D3100 stops taking pictures long exposure?