It has been a while since the Sensor Database has been upgraded, and it was time with the recent additions of some never sensors.
New features include a better layout with less clutter for comparing models. I have also added pop-up images to allow users to see a true 1:1 view of the sensor noise, rather than a 50% browser rescale. These new features will allow for better comparisons as sensors continue to improve.
Canon have improved the sensors in the EOS R and RP. The R sensor is based on the same sensor we see in the 5D mark 4, and the RP is based on the same sensor in the 6Dm2 and Canon have managed to squeeze a little more out of both for some good results.
As you can see the EOS-RP sensor performs much better than the 6Dm2 sensor over the whole range of long exposure times. Canon have possibly continued to improve the manufacturing process or the new DIGIC processing is really working some extra magic. The RP is where I expected the 6Dm2 sensor to be after the fantastic long exposure performance of the original mark I. Better late then never.
The EOS-R is also better than the 5D mark IV. It’s not the same jump in sensor improvement as the RP, but it’s still a big improvement of almost 20% less noise at 1 second. Again there is consistent gains over the long exposure testing range.
So it’s a good gain for Canon, but I do feel disappointed again, just like I did when testing the 6D mark II. Canon are making consistent gains with each new model, but the long exposure sensor noise is where the competition was years ago.
When comparing the R and RP to the Z6 and Z7 based on long exposure base noise alone It would be difficult to recommend Canon, especially if you are not gear biased. The R/RP may do better for extreme long exposures of 5 mins or more, but how these models would compare with dark frames added to remove noise for extreme long exposure I don’t know.
Conclusion: If you are currently using Canon then the R and RP are a good step up from the 5D mark 4 and 6D mark 2 in regards to sensor noise. If your thinking of upgrading to mirrorless I think both these would perform well and give good results. It’s possibly the most sensible path to go down if you have a lot of EF glass and just want to expand your kit.
The EOS-R has the best long exposure low noise sensor from Canon over 20MP, so if you are after Canon, this is the one to buy. The EOS-RP is also very respectable and not far behind. Will they be the cleanest images money can buy for long exposure?, No I expect not.
If you would like to compare the EOS-R and EOS-RP to more models, or learn more about the sensor database click here.
Again, a big thanks for Alex @Stallards in Hobart for access to these cameras for testing.
There is no doubt, the A7RII is very impressive, considering the size of the sensor it’s delivering much better results than the D810 or the 5Ds(r). It’s performance is generally much better than the older model (A7R) and it’s results are almost identical to the Canon 6D, keeping in mind the 6D is only 20MP one can’t but help be impressed.
One of the reasons I started my long exposure testing was because no one was doing long exposures at high ISO. All the low light tests performed I could find were at best a second, and in most cases much shorter than a second, in some cases as fast as the body could shoot (1/8000th). But sensor behaviour for longer exposures is not consistent, and in some cases it’s not very linear. What is good for sport is not good for astrophotography.
The A7RII’s sensor behaviour is a very clear example of why this test is important. There is no doubt for general low light work or sport this camera is going to be a killer, but what about longer exposures? At 30 seconds the A7RII is holding it’s own, but starting to loose the edge it had at 1 second, and by 5 minutes significant noise has been introduced into the shot, and it looses it edge to many other models. There is no doubt that Long exposure NR enabled would fix some of this, but not all.
So my conclusion is, it’s going to be an awesome camera killing other models for shorter long exposures (1-10 secs), it is going to match the high end models in the 10-30sec range having the benefit of more MP, but for longer exposures other models start to win out including the 5Ds(r), I’ll be very interested to see how this one goes in the field and I think there is the possibility of further testing to understand the ISO to time relationship, for example higher ISO’s for shorter periods could yield better results than lower ISO for longer periods.
Please keep in mind my tests do not take into consideration other factors such as dynamic range (DR) or how linear the ISO relationship is (ISO-less or not). I am purely interested in the noise (floor) and what you will have to deal with in post.