If this is the photo you're referencing, I took this with a Canon EOS 5D Mark II with the 70-200 f 2.8 IS II USM lens set at 95 mm. 1/30 sec at f 9.0, ISO 6400. I always use a skylight filter. I think the starburst is more a function of the lens. You can see the lens flare within the starbursts. I edited it out of the rest of the sky.