Years of observations in WFC3 (which offers a unique combination of high sensitivity and wide spectral coverage), Hubble's primary camera, the Advanced Camera for Surveys (which offers three independent, high-resolution channels covering the ultraviolet to the near-infrared regions of the spectrum), and the Wide Field and Planetary Camera 2 have given scientists varied views and detailed pieces of … Read more
The ceaseless succession of new Canon and Nikon SLRs has a certain predictability, but an unusual model came out of left field today: Canon's astrophotography-oriented EOS 60Da.
The 60Da is a close cousin to the Canon EOS 60D, a higher-end 18-megapixel model geared for enthusiasts. But the 60Da has one big difference: its infrared filter has been modified so it doesn't screen out so much "hydrogen-alpha" light, a deep-red 656.28-nanometer wavelength of light produced by excited hydrogen atoms.
By letting in about three times the amount of hydrogen-alpha red as a regular 60D, the $1,500 60Da can capture much better photos of energetic nebulae, Canon said. It's due to go on sale this month. … Read more