1 hour exposure with the Canon 5d
Last year I did a post (see it here) of a 30 minute exposure with the Canon 5d. I've done a few since then, but a few nights ago I did the longest I've tried with digital, 1 hour! It actually looks pretty good. Not sure if the 100% view would pass the quality control inspection for a stock agency, what do you think?
Even if it was a perfect file though, it's not really realistic to shoot digital for exposures longer than 15 minutes, because the camera has to do something called "noise reduction" and it takes just as long as the exposure. So, for a 1 hour exposure, it took 2 hours for that shot to finish and be saved to the CF card, which ate through the battery in 1 shot. We were camping in Idaho when I took this, so I just left the camera out overnight and went to bed. :)