The Luminous Heavens
The latest Luminous Landscape article is an introduction to astrophotography by Jeff Ball.
“Fortunately, astrophotographers are benefiting greatly from the focus efforts of digital camera manufacturers to reduce noise in their chips. The new chips, especially the CMOS chips, have proven to be pretty good astronomical imaging devices. In their current configuration, the filters reduce the sensitivity of the chips to the 656nm spectral line, but some astronomical manufacturers are actually modifying the filter on the Digital Rebel to improve the 656nm sensitivity for astronomical imaging.”