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At long last, Canon has re-entered the astrophotography market with the release of its EOS Ra Mirrorless camera. While most DSLR and mirrorless cameras work well for general photography, they often require modification to perform best while imaging the night sky. This is the third “a” camera from Canon after their 20Da in 2005 and 60Da in 2012, both cropped-frame DSLRs.
It appears Canon has fitted the EOS Ra with a filter that transmits a higher level of the H-alpha line than on its earlier “a” cameras. Canon claims it is four times higher.
