Unlike all of the other quadcopters on this list the manufacturer, Blade, has a very strong pedigree in radio controlled aircraft and because of that, Blade uses the DSM2 radio frequency standard. This is a key difference when compared to all the other quads on this list because if you have a DSM2 capable transmitter, you can fly using that rather than a lower quality transmitter the company would throw in.
Many manufacturers mount cameras inside the body of the drone. This is acceptable for casual photography, but if you want more professional results, consider adding an external camera mount, or gimbal. Gimbals allow you to place your video or still camera in front of the drone body, away from the vibrating motor and rotors. Gimbals can swivel and pivot, providing you with additional control over your imagery.
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