How does Nikon d3400 blur?

Nikon d3400 took photos with blurred background;

1: When shooting with telephoto end or medium telephoto lens, the longer the focal length, the better the blur;

2: Use aperture priority (A) mode and try to shoot with the maximum aperture;

3. After ensuring the distance needed for composition, the camera should be as close as possible to the characters and as far away from the background as possible.

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