DJI Air 2S Review: Has DJI Finally Created a Superior Successor to the Phantom 4 Pro??
Testing the image quality of the DJI Air 2S vs. the trusty old Phantom 4 Pro. Will the latest Mavic be my new go-to compact travel drone? Or should I clean the bug guts off the Phantom 4 Pro and keep using it for another year?
I have had a Phantom 4 Pro since February of 2017. It has been my go-to drone for real estate photography and video for a few years. But at some point I can’t help but wonder, “How long do these things last? Is DJI going to release a superior compact travel drone for me to upgrade to someday? Should I just fly this Phantom 4 Pro for years until a motor fails and it crashes in a field?”
Back when the Mavic 2 Pro came out in 2018 many people thought of that drone as the successor to the Phantom 4 Pro, but the Mavic 2 Pro could only do video at 4K @ 30fps, whereas the Phantom 4 Pro could do 4K @ 60fps. So the Mavic 2 Pro failed to be a totally superior successor, though it has been a popular model.
When the DJI Mavic Air 2 came out in 2020 with a 48-megapixel camera (better thought of as a 12MP quad bayer sensor) that could shoot 4K @ 60fps I had high hopes about that being my new compact travel drone, but knowing it had a smaller sensor than the Phantom 4 Pro I had my suspicions. Once I got ahold of one I pitted the Mavic Air 2 against the Phantom 4 Pro in a series of photo quality tests, and I generally preferred the image quality of the Phantom 4 Pro’s camera over the Mavic Air 2. So the Mavic Air 2 didn’t end up replacing my trusty old Phantom 4 Pro.
Now in April 2021 DJI has released the “DJI Air 2S” as the latest drone in the Mavic series. It has the same size sensor and photo resolution as the Mavic 2 Pro and the Phantom 4 Pro with 4K video @ 60fps or 5.4K video @ 30fps. Has DJI finally released a travel-sized drone that can replace my 4-year-old Phantom 4 Pro???
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Shortly after my DJI Air 2S arrived I took it along with my Phantom 4 Pro (P4P) to a couple locations to test out the cameras, because I enjoy meticulously analyzing photo quality (i.e. I’m a dork). The first location was a park. Here are some unedited photos looking straight down at about 393 feet AGL:
The first thing you may notice in the two photos above is that the DJI Air 2S appears to be zoomed out more than the Phantom 4 Pro, even though they are about the same altitude. This is expected because DJI lists the Air 2S as having a 22mm full-frame equivalent focal length, and lists the Phantom 4 Pro as having a 24mm full-frame equivalent focal length. The Mavic 2 Pro has a 28mm focal length. Obviously one focal length is not better than the other, it just depends on the situation.
The other thing I noticed but was NOT expecting is that with these unedited DNG(RAW) photos the Air 2S has better color and contrast than the Phantom 4 Pro right out of the camera. Chalk that up as a win for the DJI Air 2S!
Now let’s see if we can see a difference in sharpness when we zoom in on these photos.
When looking at these crops keep in mind that the DJI Air 2S camera and the Phantom 4 Pro are both about the same distance from the subject (the ground at the park park), but the Phantom is “zoomed in” to 24mm while the Air 2S is “zoomed out” to 22mm. This should be an advantage for the Phantom 4 Pro when comparing crops of the same sized area of the park. If you have two cameras with equal lens sharpness and sensor resolution both the same distance from the subject, but one is at 22mm and the other at 24mm, the camera at 24mm should capture more detail of the subject since it is zoomed in farther.
In the extreme crops of the lower left, middle, and lower right areas of the park photos, the DJI Air 2S crops are 513 x 341 and the Phantom 4 Pro crops are around 570 x 380 (one of them is 576 x 384) due to the variance in focal length between the two drones. If both cameras/lenses were equally sharp the Phantom 4 Pro should have no problem winning, because it is zoomed in farther and has about 23% more pixels covering each cropped comparison area.
With that in mind, can the Air 2S can still win?
Before we jump in I would just like to say it’s obvious that either drone can produce great photos for a variety of professional purposes and I am cropping these more than anyone should ever need to crop them for a real project. We are just going to be looking at the fine details with extreme closeups to see if there’s a noticeable difference.
Here is the first crop from the lower left corner of the main park images:
Surprisingly, despite the Air 2S crop being only (513x341) vs. the P4P crop being (576x384), there is actually more definition in the Air 2S crop. The branches over the white table are sharper and more defined and you can see the brick lines better.
Let’s take a look at an extreme closeup near the middle of the full images:
In this close up of the middle of the photos it’s hard to say which crop has more detail, which in itself is a win for the DJI Air 2S since it’s accomplishing a similar amount of detail with fewer pixels in the crop.
Now let’s take a look at another crop from the lower right corner of the full images:
In this crop you can see significant green and magenta fringing around the edges of the white crosswalk paint and along the edges of the cement in the (570x380) P4P crop, and the fringing is almost non-existent in the (513x341) Air 2S crop. You can also see more detail and less color fringing on the yellow/green crosswalk sign with the Air 2S. Adobe Lightroom was applying lens corrections to both images.
Just so I don’t base my entire test around one photo, let’s take a look at some photos in the city!
These photos were both taken from about the same altitude and location (though it looks like I may have been 5 or 10 feet higher with the DJI Air 2S), and you can again see the difference between the focal lengths of 22mm and 24mm. The DJI Air 2S had better color and contrast right out of the camera for the city scene as well:
Now let’s check out an extreme crop of the left side:
The biggest difference in these drones really shows up at the edges of photos, which is where many lenses show their weaknesses. The (513x341) Air 2S crop of the left side is much cleaner, sharper, and more defined than the (570x380) P4P crop. You can compare the building edges & windows in these crops to see how there’s fairly significant green/magenta fringing on the edge of the P4P lens that’s almost non-existent with the Air 2S.
One more crop from the right side:
There isn’t a ton of difference in this crop, but something that I noticed quickly is how it looks like both cameras ran into a bit of a moiré issue with the right side of that building where the lines were close together. I used a radial filter in Adobe Lightroom to correct the moiré, and here’s the updated comparison:
With the moiré not distracting from the side of the building it looks like the window lines where the moiré was are slightly more defined and less noisy in the (513x341) Air 2S crop than the (570x380) P4P crop. There also might be a little more color fringing and noise with the P4P, but other than that there’s not a huge difference.
I wanted to do one more test in a high dynamic range situation after sunset where the foreground was very dark. In order to take photos at the exact same time identical lighting in each shot I just set both drones on a table and took the photos at the exact same time. Here are the original unedited photos taken at ISO 100, f/2.8, 1/25th shutter speed:
Here are the same photos with highlights reduced to -79 and shadows cranked to +95 in Adobe Lightroom:
And here are crops of the center of each photo:
If you compare the lower part of the tree trunk in the middle, the pine branches, and tree leaves, you can see how much sharper the Air 2S is right in the center of this high dynamic range scene.
Conclusion
The only thing I miss while using the included DJI Air 2S remote and the DJI Fly app is the ability to change camera settings with the wheel on the remote. With the remotes included with the Inspire 2 or Phantom 4 Pro you can press the right wheel to cycle through camera settings and then turn the wheel to change a setting in the DJI Go app. With the DJI Air 2S remote you have to tap on the screen and drag the slider to change values like shutter speed, ISO, or white balance.
Other than minor differences in the remote & app, after comparing the photo capability of the DJI Air 2S with my trusty Phantom 4 Pro in a variety of situations it is clear the Air 2S has a much sharper camera/lens combination. The sharper lens combined with the highest video resolution of any compact drone from DJI (i.e. smaller than an Inspire) has made the DJI Air 2S my new favorite travel drone.
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