| Moon in Hydrogen Alpha light. A 1 second exposure using a narrowband Hydrogen alpha filter with the main Genesis16 ccd camera, taken on Sunday 18 Dec 2005. This was just an experiment really; I wanted to see if the Hydrogen Alpha filter could cut out enough light so that the ccd chip in the main camera wasn't saturated. Success! You'll notice, if you look closely, that the Moon isn't quite focussed; this is to be expected if the telescope has been focussed on the much more distant stars. (#24/25, ) |
