Canon's astrophotography-specialised mirrorless — modified IR filter for hydrogen-alpha nebula capture.
The Canon EOS Ra launched in 2019 as a specialised version of the EOS R with a modified infrared-cut filter that transmits approximately 4x more hydrogen-alpha light. It was designed specifically for astrophotographers wanting to capture emission nebulae in vivid detail.
Based on the EOS R with the same 30.3MP full-frame CMOS sensor and Dual Pixel CMOS AF. The modified IR filter increases H-alpha wavelength (656nm) sensitivity — emission nebulae like the Orion Nebula glow much more vividly. 30x magnification in Live View for precise manual star focusing.
Canon RF mount. Same body and controls as EOS R. The modified filter makes the camera less suitable for everyday photography — reds appear oversaturated and auto white balance behaves differently. Dual Pixel AF still functions. Silent electronic shutter for vibration-free captures.
Available used at mid-range to professional prices — very niche market. The Ra is one of very few factory-modified astrophotography cameras. The standard EOS R is more versatile for general use. For dedicated astrophotographers who want OEM-supported H-alpha sensitivity without third-party modification.