Usually here on the blog I'll want to vary the subject matter each day. Today though, I'm going to follow on with yesterday's post, where I was in downtown Sacramento shooting some recognizable landmarks at night. The bridge shot from yesterday was kind of a spur of the minute thing as I was walking to get into position to take this shot:
Sacramento Icon
Canon 1D mk III, 16-35 f2.8, f7.1, .8/sec, iso 320
Between modern photography equipment and the City of Sacramento, getting this shot isn't as hard as you might imagine. The city nicely provides a huge dock that allowed me to get down on the water, and they light up the bridge so nicely, don't you think? It really does look like this in person.
I had my sturdy Manfrotto tripod of course - you can't do this work without a tripod. I picked the f-stop I wanted, f7.1 in this case, and did a quick meter reading. Given that I was on a floating dock (albeit huge and sturdy), I wanted an exposure time of 2 seconds or less. So I just bumped the iso (which is sensor "sensitivity") until I got that shutter speed. Then you depress the shutter and let the camera do the work.
Then I looked at the image on the camera, where I had "overexposed" areas set to blink. So you can tell at a glance that portions of the picture will be overexposed. In a photo editing program like Photoshop or Lightroom, you can recover from underexposure (too dark) but not over exposure (too light).
Given that I had overexposure, I used something called exposure compensation, which basically overrides the camera's internal meter, until I had a shot with no overexposure. Since I was in aperture priority mode, the compensation sped up the shutter, with a final speed of .8 of a second. The amount of exposure compensation was minus 1 2/3 of a stop. I don't know if it sounds difficult, but it really isn't that hard.
You can read more about the bridge on wikipedia. And click on the jump link below to see another very famous Sacramento landmark.
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