Comet McNaught (C/2006 P1)
This spectacular comet, currently reported as the brightest in 30 years, was readily visible from even the heart of downtown Seattle. After work, I hustled down to Pier 59 for a clear west view of the sunset. After only a few minutes I made out the faint coma of the comet. After the minutes ticked by, its amazing tail grew more distinct, despite the still-orange twilight.
I didn't have a tripid, but bracing against the 20mph wind with a railing, I managed to take a number of photos, even as long as 1.5 seconds. The comet was bright enough to image at ISO100.
I switched between using the Canon EF 70-200mm F4L with and without the 2x tamron teleconvertor.