DPReview.com is closing April 10th - Find out more

Canon EOS Ra Sensor Measurements at PhotonsToPhotos

Started Aug 13, 2020 | Discussions thread
EthanCam Regular Member • Posts: 111
Re: Canon EOS Ra Sensor Measurements at PhotonsToPhotos

GXAlan wrote:

What’s also interesting is that long exposures are different between the R and 5D4

https://www.brendandaveyphotography.com/canon-consistent-with-eos-r-rp/

I have sent Brendan some files from the Ra. At 5 min, I was getting 54-ish with SD of 18-ish Which is also better than the regular R.

The Sony sensors are very good for terrestrial but they still have filtering for astro. The GFX100 is spectacular but it’s not cost effective to convert it for Ha sensitivity. A variant of the A7R4 sensor is available in a cooled Astro camera, but you lose the flexibility of the DSLR.

That's interesting, here my theory:

5D4: older DIGIC6+ -> higher thermal noise (affecting long exposures) than EOS R
R: DIGIC8
Ra: DIGIC8,  but probably lower conversion gain -> similar thermals as EOS R but better noise statistics because of lower conversion gain

Yes, Sony are known for doing some sort of 'star eater thing', Mark Shelley's website is informative on that. But I am not an astro-photography expert

Post (hide subjects) Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow