Panasonic AJ-CX4000 Operating Instructions Manual page 40

What is lens chromatic aberration?
"Chromatic aberration" here refers to zoom factor chromatic aberration. Zoom factor chromatic aberration occurs since the diffraction ratio of a lens
differs according to red (R)/green (G)/blue (B). Chromatic aberration on the lens itself is compensated for, but still remains in the periphery, in particular.
Also, this chromatic aberration occurs on zoom lens due to a complex relationship between zoom ratio, aperture and focal distance. In image terms, this
is registration error.
Chromatic aberration compensation function
Mount the chromatic aberration compensation function compatible lens to compensate the chromatic aberration. The chromatic aberration
compensation function will automatically operate. Or, store the chromatic aberration characteristics of the lens regarding zoom ratio, aperture, and focal
distance to the camera beforehand. Connect a lens that matches those chromatic aberration characteristics, and perform compensation matched to the
zoom ratio, aperture and focal distance of that lens.
@
NOTE
t For details on additions and modifications to lenses compatible with the chromatic aberration compensation function, visit the support desk at the
following website:
https://pro-av.panasonic.net/
Operation of chromatic aberration compensation function
Operate in following steps when a chromatic aberration compensation function compatible lens is mounted to the camera.
1
Mount the lens on the camera, and connect the lens connector to the camera.
2
Set to the [CAMERA] menu → [CAC ADJ.] → [CAC CONTROL] → [ON].
The chromatic aberration compensation data is read from the lens and the chromatic aberration compensation function will operate automatically
when the camera is turned on.
If the lens model number stored on the camera matches the model number of the connected lens, the chromatic aberration data stored on the
camera will automatically be read on a preferential basis.
Viewing the operation status of chromatic aberration compensation function
1
Push the <MARKER SEL>/<MODE CHECK> switch towards the <MCK> side with the menu not displayed in the viewfinder screen.
If the letters [CAC] are displayed at the top right of the viewfinder screen, the chromatic aberration compensation function is in operation.
If the letters [CAC] are not displayed, the chromatic aberration compensation function is not in operation.
2
Set to the [VIDEO OUT/LCD/VF] menu → [INDICATOR] → [CAC] → [ON].
The letters [CAC] are displayed at the top right of the viewfinder screen.
This is set to [ON] as the factory setting.
Chapter 3 Preparation — Mounting and adjusting the lens
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G
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