Moonset over San Francisco, photo by Harold Davis. View this image larger.

The view of San Francisco Bay out to the west from Indian Rock in Berkeley was a bit hazy. But the setting crescent moon and nearby Jupiter and Venus were very special. I spent a little more than an hour photographing the descent of the moon. I varied the exposure time between one and three minutes as the light faded. I also varied the interval between exposures, with a gap between the early exposures and none at the end.

I stacked all the exposures together using the Photoshop Statistics action. I think my computer took more time thinking about combining the nineteen exposures than they took to expose in the first place. Well, it seemed that way.