In UE5.4,Why is the depth of field so noisy and full of noise when my movie camera is set to 0.1 aperture?

The markings are strange, and there is strange noise in the depth of field.


Anti-aliasing is set to TSR, and all image qualities are adjusted to the highest

Are there other settings that can improve the quality of the depth of field footage?

Here are my cine camera settings:

{
	"Tagged": [
		[
			"Filmback",
			"(SensorWidth=70.410004,SensorHeight=56.630001,SensorAspectRatio=1.243334)"
		],
		[
			"Filmback.SensorWidth",
			"70.410004"
		],
		[
			"Filmback.SensorHeight",
			"56.630001"
		],
		[
			"Filmback.SensorAspectRatio",
			"1.243334"
		],
		[
			"LensSettings",
			"(MinFocalLength=4.000000,MaxFocalLength=1000.000000,MinFStop=0.020000,MaxFStop=22.000000,MinimumFocusDistance=15.000000,SqueezeFactor=1.000000,DiaphragmBladeCount=6)"
		],
		[
			"LensSettings.MinFocalLength",
			"4.000000"
		],
		[
			"LensSettings.MaxFocalLength",
			"1000.000000"
		],
		[
			"LensSettings.MinFStop",
			"0.020000"
		],
		[
			"LensSettings.MaxFStop",
			"22.000000"
		],
		[
			"LensSettings.SqueezeFactor",
			"1.000000"
		],
		[
			"LensSettings.DiaphragmBladeCount",
			"6"
		],
		[
			"FocusSettings",
			"(FocusMethod=Manual,ManualFocusDistance=3500.000000,TrackingFocusSettings=(ActorToTrack=None,RelativeOffset=(X=0.000000,Y=0.000000,Z=0.000000)),DebugFocusPlaneColor=(B=204,G=26,R=102,A=153),bSmoothFocusChanges=False,FocusSmoothingInterpSpeed=8.000000,FocusOffset=100.000000)"
		],
		[
			"FocusSettings.FocusMethod",
			"Manual"
		],
		[
			"FocusSettings.ManualFocusDistance",
			"3500.000000"
		],
		[
			"FocusSettings.TrackingFocusSettings",
			"(ActorToTrack=None,RelativeOffset=(X=0.000000,Y=0.000000,Z=0.000000))"
		],
		[
			"FocusSettings.TrackingFocusSettings.ActorToTrack",
			"None"
		],
		[
			"FocusSettings.TrackingFocusSettings.RelativeOffset",
			"(X=0.000000,Y=0.000000,Z=0.000000)"
		],
		[
			"FocusSettings.TrackingFocusSettings.RelativeOffset.X",
			"0.000000"
		],
		[
			"FocusSettings.TrackingFocusSettings.RelativeOffset.Y",
			"0.000000"
		],
		[
			"FocusSettings.TrackingFocusSettings.RelativeOffset.Z",
			"0.000000"
		],
		[
			"FocusSettings.TrackingFocusSettings.bDrawDebugTrackingFocusPoint",
			"False"
		],
		[
			"FocusSettings.bDrawDebugFocusPlane",
			"False"
		],
		[
			"FocusSettings.DebugFocusPlaneColor",
			"(B=204,G=26,R=102,A=153)"
		],
		[
			"FocusSettings.DebugFocusPlaneColor.R",
			"102"
		],
		[
			"FocusSettings.DebugFocusPlaneColor.G",
			"26"
		],
		[
			"FocusSettings.DebugFocusPlaneColor.B",
			"204"
		],
		[
			"FocusSettings.DebugFocusPlaneColor.A",
			"153"
		],
		[
			"FocusSettings.bSmoothFocusChanges",
			"False"
		],
		[
			"FocusSettings.FocusSmoothingInterpSpeed",
			"8.000000"
		],
		[
			"FocusSettings.FocusOffset",
			"100.000000"
		],
		[
			"CropSettings",
			"(AspectRatio=2.390000)"
		],
		[
			"CropSettings.AspectRatio",
			"2.390000"
		],
		[
			"CurrentFocalLength",
			"70.000000"
		],
		[
			"CurrentAperture",
			"0.100000"
		],
		[
			"CurrentFocusDistance",
			"0.000000"
		],
		[
			"CurrentHorizontalFOV",
			"53.398258"
		],
		[
			"CustomNearClippingPlane",
			"10.000000"
		]
	]
}

This is the expected default behavior.

It may be possible to improve it. See this video

Regrettably, this appears to be a problem exclusive to UE4, as the issue has been resolved in UE5. Nonetheless, upon closer examination, my UE5 still appears to be riddled with noise.