Canon EOS Ra Sensor Measurements at PhotonsToPhotos

Neuropsychology wrote:

Marco Nero wrote:

bclaff wrote:

Not intended for terrestrial photography.
There seems to be no attempt to balance the channels for the increased red sensitivity.
This separation, highlighted on the left, is unusual:

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I find the EOS Ra to be surprisingly noise-free at higher ISO settings. The sensitivity to magenta is definitely there as a result of the IR-cut sensor. Hence the images of re nebulae are strongly saturated. Overall, it's an impressive camera that needs no IBIS but can still be used for terrestrial photography if you're willing to edit your images. The only thing that proves challenging is processing skin tones. But that's to be expected from an Astro-specific camera.
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I've been incredibly impressed with the EOS Ra's performance. I look forward to seeing what it will capture with longer exposures and longer lenses when used on an EQ Mount to track the sky. The images it has captured for me so far - with merely 6 second and sometimes 10 second exposures - have been extraordinary.

I did a comparison between the Ra and A7r3 tracked. It was not mind blowingly better but I preferred the colors of the Ra. The sony was better at capturing light with less noise though.

EOS Ra + RF 85mm f/1.2L USM lens - untracked 6-second JPEG (3x shot mosaic)

EOS Ra + RF 85mm f/1.2L USM lens - untracked 6-second JPEG (3x shot mosaic)

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I haven't taken any tracked shots yet so these are unstacked JPEGS with 6 second exposures.  I just wanted to test this specific lens with the EOS Ra.  So far it's quite an amazing combination.  But I've now seen enough merit in the EOS Ra to slowly acquire and assemble a sturdy EQ Mount to use it on. I'm yet to source my power supply (Celestron has run out of the 12V 5A variety until late September) but I'm almost ready to go. I'll be sure to report in when I get to sample some shots with longer exposures and slightly smaller apertures.  I have no idea if this will work properly... but it should.
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Just waiting for a power supply to become available.... (the smaller Celestron Lithium Power Tank on the right will probably be used to power my lens warmer). The camera + lens is large enough and heavy enough that I needed a mount that would offer me more payload than I might require - with a scope fitted at a later date.  I'll be interested to see how the Ra works with a good telescope.