The image below of the Aurora and star trails was done this way and I describe this simple technique in a previous article " Star Trail Photography and Time Lapse Movies".
#Startrail photo software
Then you take the images and stack them on top of each other and blend them together using software like Star Stax which is available for free. You can use an intervalometer to set your camera to shoot at precise intervals and set the exposure to expose the night sky for 10 sec to 5 minutes depending on your ISO speed and f/stop setting. Photographers can reduce their aperture to F8 or F11 to lengthen the exposure time before it "blows out" but there is a better method. One of the problems with digital cameras is that if you leave the camera open too long the chip overheats and the result is a badly over exposed image. Some photographers still use this technique (e.g. In the past photographs would set up their cameras on a tripod, set the camera to B or bulb exposure mode, and then lock the shutter open for several hours. Most photographers know that if you point your camera at the north star and leave it open for several minutes to several hours, the stars will appear to rotate around the north star (in the northern hemisphere) and leave a curved trail of light. But my real interest is photographing the star patterns, the milky way and the Aurora borealis. I am fascinated by stars on a clear dark night so much so I purchased a Telescope many years back. Star Trails, Aurora borealis over Amethyst Lake in the Tonquin Valley, Jasper National Park (DM) Creating Star Trail Photomontages in Adobe Photoshop CS6
0 kommentar(er)
