1. A method of controlling image focus in a digital imaging system, the method comprising: receiving, by at least one processor of the digital imaging system, a depth-scene image pair generated by a depth-scene image sensor pair included in the digital imaging system, the depth-scene image sensor pair including a depth sensor and a scene sensor, the depth-scene image pair including a depth image and a scene image; aligning, by the at least one processor, the depth image with the scene image, wherein each pixel in the scene image has a corresponding depth in the aligned depth image; detecting, by the at least one processor, a user gesture in a scene image stream generated by the scene sensor; selecting, by the at least one processor, a focus effect to be either a depth of field focus effect or a view camera focus effect, in response to the user gesture; and applying, by the at least one processor, the selected focus effect to at least a portion of the scene image based on depths in the depth image.