size of the sensor while holding focal length and aperture constant will decrease the depth of field (by the crop factor). The resulting image will also have a different field of view. If, however, the focal length is altered to maintain the original field of view, while holding the aperture constant, the will remain constant.

Effect of lens aperture

For a given subject framing and camera position, the is controlled by the lens aperture diameter, which is usually specified as the f-number (the

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