<P> DOF is determined by subject magnification at the film / sensor plane and the selected lens aperture or f - number . For a given f - number , increasing the magnification , either by moving closer to the subject or using a lens of greater focal length , decreases the DOF ; decreasing magnification increases DOF . For a given subject magnification , increasing the f - number ( decreasing the aperture diameter ) increases the DOF ; decreasing f - number decreases DOF . </P>
<P> DOF is determined by subject magnification at the film / sensor plane and the selected lens aperture or f - number . For a given f - number , increasing the magnification , either by moving closer to the subject or using a lens of greater focal length , decreases the DOF ; decreasing magnification increases DOF . For a given subject magnification , increasing the f - number ( decreasing the aperture diameter ) increases the DOF ; decreasing f - number decreases DOF . </P>
to increase the depth of field what must you do to magnification
to increase the depth of field what must you do to magnification
decreasing magnification increases DOF
decreasing magnification increases DOF