I'm doing some research at lunch, and have not been able to find this information on the web or in the manual...
Is there a time limitation to the Bulb exposure? Is it limited to battery life?
What happens when a long exposure is done without the NR turned on, does it get very grainy?
Does the NR setting do a second dark frame exposure?
I'm thinking about star trails, etc. and want to understand the limitations of the camera.