Since the weather is good these days with acceptable temperatures (between -2 ° and + 3 ° at an altitude of 1200 m), My brother and I (and who knows how many other people who are passionate about photography) we have the opportunity to make some pictures to astronomical constellations of the winter sky, both single shots to keep the album personal and shared, even shots at regular intervals by a precise amount of time.
These shots on a regular basis, you ask, what are they for? Why take dozens of pictures all at the same subject? The answer is simple and the result is nothing short of astonishing: In order to create a single image in post production is the sum of all the pictures: Star Trails (path of the stars).
The software we're talking about is called Startrails and is free.
addition to creating a single photo, the program also has the function creates video, individual images are combined into a movie lasting a few seconds, depending on the number of photographs taken.
The beauty of digital photography, which has had enormous development in recent years, is this too, and you can take hundreds of photographs at virtually zero cost, excluding costs for the necessary equipment.
L ' alternative is to have a film SLR camera or a brand new digital generation, is to take a single photograph using the shutter speed of bulb tot. minutes, eg 45 minutes using a cable release or remote control, remember that during the installation or the poses, the camera should not be touched in order to avoid any risk of image blur.
So otterrai l'immagine con la tipica "strisciata" del lento movimento astronomico.
Di seguito le immagini realizzate la sera del 2 febbraio 2011 località Tre Croci, Campo dei Fiori - Varese dalle ore 20:54 alle ore 22:48
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| Nikon D300; fisheye 10.5mm; f/2.8; ISO 800; 171 immagini da 30 sec. |
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| Nikon D70; fisheye 10.5mm; f/2.8; ISO 1600; 53 immagini da 30 sec. |
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