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**View angle** = field of view (FOV) of the camera. - Given the **same flight height**, view angle is determined by **focal length**. - **Smaller focal length → larger view angle** (wide-angle lens). - **Larger focal length → smaller view angle** (telephoto). - Diagram relationships: `f₁ > f₂ > f₃` ⟺ `α₁ < α₂ < α₃`.

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