How do the Canon EOS R7 vs Sony a6600 compare? What are the main differences?…
Here is a Canon EOS Ra review. The Canon EOS Ra is a special EOS R camera dedicated to astrophotography.
What sets the EOS Ra apart? The Canon EOS Ra has approximately four times the transmittance of hydrogen-alpha light (656 nm) as the EOS R (see the press release here). Photographs of subjects that reflect a lot of infrared light will therefore appear redder than they actually are.
The Phoblographer posted their full Canon EOS Ra review. From their conclusion:
The Canon EOS Ra is a mighty fine camera. The build quality is fantastic, overall image quality is excellent, the camera is weather-sealed, has a wonderful LCD and EVF, and the images that come from the camera during daytime use are great too.[…] The Canon EOS Ra is a serious piece of kit. It has been designed for photographers who are passionate about astrophotography, more specifically, deep space photography. If you plan on getting a telescope to attach the EOS Ra to, or if you already own one and the required T-adapters and mounts, you will get the most out of it. If you are just going to do regular wide-angle astrophotography, though, you’re better off looking elsewhere because the specialized Ha filter will be lost on you. Read the review at The Phoblographer
While the Canon EOS Ra is not the best tool to take pictures in daylight, it delivers “surprisingly great image quality when set to daytime white balance“.
More Canon EOS Ra review stuff is listed here.