Thanks, that was the problem. The video was to be with the manual exposure setting off.
With this change the entire list delplegó slower speeds.
a greeting

I have a tablet samsun galaxy tab 2 and connected to nikon d7000.
When I select manual mode dee exposure, the maximum open time that allows me is 1/30. iso 100 with the live view remains dark.
in the scale-down after 1/30 comes bulb, and prevents sectioned.
I can increase the riempo of exposure. TO ...