Monday 29 September 2008

Uranus

Got this shot by stacking a few 0.5 and 0.8 second exposures with the Canon at the end of a barlow, slid out from it's regular position to increase magnification - a 4,500 mm zoom lens if you like. The width of the disk from the image works out to be a very tiny 3.5" (arc seconds), close to the actual value of 3.7". I boosted the contrast but the colour is natural. It is a good example of what you can get from a back yard in the middle of a city!

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