DJI Phantom 4 review: the drone that won’t crash into things
The Phantom 4 was something of a surprise, launched not even a year after the first Phantom 3 models: the Pro and Advanced. In fact, it has only been mere weeks since the Phantom 3 4K was unveiled at CES 206, but the Phantom 4 has quite a few nifty tricks up its sleeve that'll tempt you. Also see: Drone buying buide - best drones 2016 and Best new drones coming this year.
It's the first consumer drone which will actively avoid objects, and that's a huge deal. With almost every other quadcopter, you're in charge of making sure there's nothing in the way. The Phantom 4 has five cameras which let it see what's around it and prevent crashes by slowing to a halt, or even going over or around obstacles.
DJI Phantom 4 review: Price
There's but one drone in the Phantom 4 range, and it costs £1229 direct from DJI. There are no options: you get a 16GB microSD card in the box and the box itself is a handy carry case. One battery is included which lasts around 25 minutes: roughly the same flight time as previous models.
This isn't going to be enough for most people, and extras cost a whopping £129 each from the official DJI store. Using third-party batteries isn't recommended, and none exist yet anyway.
The quick-release props cost £14 for a set of four, but you get a spare set in the box. Also see: The UK law on flying drones explained.
DJI Phantom 4 review: Features and design
There are a couple of differences you'll notice immediately. One is the glossy finish on the Phantom's body which gives it more of a premium feel. The gimbal is built into the Phantom's body, not for a sleeker look but to bring it closer to the centre of gravity.
The battery is a new design with a new connector. It can only fit into the craft one way, but the charger can be attached either way up, like a USB C cable. The charger itself has a second connector which allows it to charge the battery and the Phantom's controller at the same time.
Another change is the push-n-twist propellers which are supremely quick to fit and remove. The quick-release mechanism is much like the Inspire 1's and DJI says it allows the motors to spin up and down faster without the props coming loose as they would with the self-tightening type used on the Phantom 3.
Quite obviously, there are two cameras built into the front legs, which work in conjunction with the main 4K camera to look out for buildings and other objects. Two more face downward, and there are two uprated ultrasonic sensors which let you fly at up to 10m off the ground without GPS (previously the limit was 3m on the Phantom 3).
There are changes on the transmitter too. One is the sliding mode switch which includes a new Sport mode, and another is a pause button on the right shoulder which stops the drone and makes it hover - useful if you think it's about to get into trouble.
It's otherwise identical to the Phantom 3 Pro / Advanced remote controller, with a fold-out phone/tablet holder that's big enough for an iPad Air. Note that you can't use an iPad older than an iPad Air as the DJI Go app is not supported on iPad 2, 3 or 4. Android is supported, but check compatibility with your device.
For those unfamiliar, the controller has a full-size USB port for connection to your phone or tablet, which leaves its Wi-Fi free for other things, such as tethering to a phone. That's useful when you want to download map data within the app in real-time, but it is also possible to cache maps before you head out.
The remote has two dials, the left for gimbal control - we still feel it's positioned too far over for a comfortable reach - and the right-hand jog dial for changing exposure settings such as shutter speed and aperture. Two buttons on the back are customisable and can be set to do things such as display the advanced camera settings.
DJI Phantom 4 review: Performance
Flying the Phantom 4 is a similar experience to flying any other Phantom, but you've a host of extra modes at your disposal. In Sport mode you get to use the drone's full potential, but it can be risky as it's faster than you expect. Acceleration is amazing, and we've no reason to doubt the claimed 45mph maximum. Also see: How to fly a drone.
While the motors sit higher to try to avoid the propellers ever being visible in the frame, that doesn't apply in Sport mode, especially when flying forwards where you will definitely see them. The avoidance system is disabled in this mode, which is why it's risky to use it unless you're sure you're higher than any trees around you.
The default mode is P-mode - positioning. What's odd is that the visual system isn't enabled by default and you also have to enable the 'go around' and 'go over' modes separately. So don't assume it will stop before hitting a wall when you first get it out of the box.
With the avoidance settings enabled, you get an automotive-style heads-up display which shows how far away are detected obstructions. It works up to 22mph, and will detect objects (which are large enough) from around 1-15m. If you continue flying towards an object, the Phantom 4 will simply come to a halt and hover in position.
If you've enabled the extra modes, it will attempt to fly around an object in its path, or fly up and over it - this also works when you enable the intelligent return to home function. In the few tests we tried, the system worked well, stopping short of bushes, trees, brick walls and people. However, DJI is keen to point out (even in the app) that it can't detect thin objects such as tree branches without leaves, fences and power lines - not that you should be flying near those anyway.
It won't stop the craft flying into glass doors or windows, either.
In terms of range, you can set limits in the app for height and distance, but you shouldn't fly higher than 120m (400ft) by law, or 500m away from you with line of sight. We flew to these limits and had no issues with signal strength or the video feed becoming choppy or breaking up - it was faultless.
The intelligent flight modes are easier to use than before, but you still have to fly the Phantom over an object to set it as a point of interest. It would be far easier to tap on a map. The good news is that you have control over the radius and altitude while in POI mode, and you can also change the speed during the manoeuvre using an on-screen slider.
You can use the Follow Me feature as with the Phantom 3, but it will only follow the position of the controller and won't train the camera on a subject. Thankfully, the new ActiveTrack mode does away with GPS following and can identify people on screen: you just tap the person to track and - once identified as a person - the Phantom 4 will keep the camera on that person and follow them. They don't need to be holding the transmitter or a phone. Plus, the system works at only a few metres off the ground. With Follow Me, 10m is the lowest height possible.
The only issue is that the new mode couldn’t keep track of a fast-moving child, and lost its lock when she made abrupt changes in direction. It was more successful with adults, and we’re sure it’s an area DJI will improve with future updates. Also read our DJI Phantom 3 Standard and Professional reviews.