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