Tuesday, 25 October 2011
Embedded deep in the centre of the milky way is a stunning stellar asterism around the star ζ (zeta) Scorpii. Here I show the area in four levels of magnification taken with various optical pieces of equiment, while in La Palma. The wide view was produced by continuously taking 15 second pics on a little tripod, through a 50mm f/1.4 lens. The next level was 2 minute exposures through a telephoto lens on a low zoom atop an Astrotrak platform that wasn't quite aligned, at f/3. The following image was produced from 4 x 5-minute exposures at nearly full zoom that were possible once the Astrotrak had been aligned. The last picture is a mosaic of two 5 minute pictures taken through a guided 4-inch vixen refractor, using an astronomy-modified Canon 350D.
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