Loooong Exposures [using digital camera]

http://www.tawbaware.com/imgstack.htm If you can see stars through the pollution use the multiple exposure trick.

Attach the XTi to laptop via USB cable and setup the canon software to take and x second exposure every x seconds or x+1 seconds if your camera get's narky about it like the Nikon D200 does. Then stack the images together using the max function. The stars will trail but the light pollution won't get any worse.

It's no substitute for darkness though since there's only so many stars you can see through pollution :(

Just remember the D80 and the XTi have plastic bodies. If the body is warm then the sensor is HOT. A 60min exposure made my camera very bloody hot (metal body). By all means go for it just be careful.
 
I primarily do astrophotography and use the "stacking" method alot because I shoot in the light polluted suburbs of St. Louis. Other then astrophotos or a tail light photo I cant see why someone would want that long of a exposure.

OP: What are you trying to take a picture of?
 

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