For example, OPTI has a built-in Optiflow Sensor (a downward facing sensor), which functions by picking out the patterns on the ground to ensure that the drone maintains a straight position.  ATTI, conversely, works a bit differently. With the ATTI, the drone employs other techniques apart from the external sensors to keep the drone in the right orientation and altitude. Thus, the drone can hover in place, or drift slightly around with the wind serving as a push. You will also find a GPS in some drones, and they help the drone to maintain coordinated and precise flights and landings.

For any newcomer interested in diving into the world of drones, look no further. RC Hobby Review has compiled a list of some of the best affordable, and not a single one that follows will be priced higher than one hundred dollars. As beginner it can be a bad idea to jump right into a mid-range or expensive drone, that you could easily crash and total.  There are even affordable cheap drones with camera attachments that we'll look into. We'll break each one down, exposing the pros and cons, and ins and outs so that even complete beginners will be able to find the perfect drone for them. Without further ado, here are is the list.


Another big addition is Spark’s obstacle avoidance system. While the ability to sense and avoid objects is usually a feature reserved for larger drones, DJI went ahead and built one into the hull of the Spark. It’s not quite as robust as what you’ll find on the Phantom 4, or even the Mavic Pro, but it still serves its purpose, and helps you avoid crashes.
This drone seriously has it all. It’s powerful. It’s portable. It can dodge obstacles autonomously. And to top it all off, it has a camera that produces some of the best-looking aerial imagery we’ve ever seen. Truth be told, you can get a lot of these features in the original (and still very good) Mavic Pro, but the Mavic 2 Pro just does everything better.
The other primary consideration is how the photos and video are stored after you take them. Drones with WiFi capabilities will work with your mobile device, letting you see and store media real-time on your phone. For those that don’t, you’ll store the media on the drone, usually on a microSD card. If this is the case, know how much storage the drone comes with and whether (and by how much) it can be upgraded.
For video quality, we shoot a variety of clips at various resolutions and frame rates, including the maximum available. We film high contrast and low light scenes, along with close-ups of people to evaluate detail and skin tones. Special automated modes like DJI’s Quickshots are also tested. These uncompressed files are then evaluated on a calibrated monitor, along with the drone’s still photos. Stills are shot at maximum resolution and, if available, in Raw. We check for colour, noise and dynamic range, and also look at other shooting modes like HDR and panoramas.
At that point, the advanced obstacle avoidance systems and SmartCapture features are just icing on the cake. But these high-tech features also make the drone extremely accessible to newer pilots who may not know how best to handle their first photography drone. So if you want the power of a Mavic 2 with a less frightening price and intimidating feature set, the Mavic Air is an excellent choice.
If you are a beginner just learning to fly with these cheaper drones, take your time to learn the controls by flying in a safe area that is a wide open space, with no wind, and no obstacles. At first, fly low to the ground until you can maneuver your drone correctly. Practice flying on a single battery charge and then let the drone cool down for ten minutes before flying more. 
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