The opposite-- increased axial magnification-- happens with shorter focal lengths while moving the camera / lens towards the object.
2.
Related to this concept is "'axial magnification "'--the perceived depth of objects at a given magnification.
3.
One can see that if magnification remains constant, a longer focal length results in a smaller axial magnification, and a smaller focal length a larger axial magnification.
4.
One can see that if magnification remains constant, a longer focal length results in a smaller axial magnification, and a smaller focal length a larger axial magnification.
5.
One can see that if magnification remains constant, a longer focal length results in a smaller axial magnification, and a smaller focal length in a larger axial magnification.
6.
One can see that if magnification remains constant, a longer focal length results in a smaller axial magnification, and a smaller focal length in a larger axial magnification.
7.
For an object of finite depth, one can conceive of the " average " axial magnification as the ratio of the depth of the image and the depth of the object:
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