With the release of Adobe Camera Raw 18.7, we now have Raw support for the OM System PEN, bringing us one step closer to being able to complete our review.

As you might expect, the PEN’s performance is a match for that of the OM-5 Mark II, with which it shares a sensor and processor. This may seem obvious but we have to check, to be certain that our assumptions about shared components are correct and that there are no unreported changes to the processing. It also ensures that you can select the OM System PEN in our test scene, if you want to make any comparisons in future.

Its 20MP sensor captures a good level of detail (our test scene gives a slight benefit to 4:3 aspect ratio cameras, reducing the already minor difference between the PEN and the 24MP of the Canon EOS R10). In terms of noise the PEN’s performance is a little behind the larger sensor of the Nikon Z50II, but it’s not significantly noisier than the Canon, whose 1.6x crop sensor seems to slightly underperform expectations.

The PEN’s performance is entirely in keeping with what we’d expect to see from a modern sensor, backing up the results we got when shooting its sample gallery. We’ve already seen that the JPEG engine can produce a range of attractive results and these confirm that the technical underpinnings are sound.