At a certain point, shrinking the hole would not Enhance the resolution due to diffraction limit. Outside of this Restrict, making the hole scaled-down can make the image blurrier and also darker.
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Useful lens assemblies can also consist of mechanisms to handle measuring mild, secondary apertures for flare reduction,[nine] and mechanisms to carry the aperture open right until the instant of exposure to permit SLR cameras to emphasis with a brighter picture with shallower depth of disciplin