Archive for the Wide Angle Category
Manual focus (prefocus before it gets dark, tape it down), Canon 17-40 on tripod, f/5.6 or so, ISO 400, Bulb mode (shutter stays open as long as you press the shutter). These are 2,3 ,4, or 5 second exposures, trying to capture only one, interesting burst. These are the 15 prettiest, out of 150 frames. Lightroom to adjust exposure, and crop. Prints here.
10 second exposure @ f/5.6, ISO 100, 17mm
I mounted the camera on a tripod, set focus to manual, focused with live view. With camera on manual mode, experimented with ISO and aperture to get reasonable exposure using 10 second shutter, then locked-down the shutter so it would shoot unlimited 10-second exposures. Out of 300 or so frames, this was the keeper!
These images are composites of multiple frames: 25, 53, 76, and 157, so at 30 seconds per exposure, the images capture 12, 25, 38, and 78 minutes of star movement. I use free software called StarStaX to blend them all together.