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Chromatic Aberration Compensation (CAC)
CAC is a function that automatically corrects registration errors mainly caused by slight chromatic aberration, which cannot be
corrected with lenses, and minimizes color weepage on the images.
What is the chromatic aberration?
Chromatic aberration means magnification ratio chromatic
aberration. Magnification ratio chromatic aberration is
caused by differences in the in red (R), green (G), and blue
(B) refractive indexes of a lens. The lens itself corrects
chromatic aberration but the astigmatism remains in the
surrounding area in particular. The zooming ratio, iris, and
focal distance involves complicated chromatic aberration
phenomena in a zoom lens. Images have registration errors.
Chromatic aberration compensation function
To correct the chromatic aberration, record the chromatic
aberration characteristics of the lens for the zooming ratio,
iris, and focal distance in the main unit of the camera-
recorder and connect a lens suitable for these
characteristics. Then perform the correction in accordance
with the zooming ratio, iris, and focus distance of the lens.
The CAC data for the following four kinds of lenses are
stored in the unit at the time of shipment from the factory.
Indication on the unit
HA16X 6.3BERM-M58
HA22X 7.8BERM-M58
HJ17EX 7.6B IASE
HJ22EX 7.6B IASE
Visit our Web site at the address given below for details on
additions or changes to lenses supporting CAC.
http://pro-av.panasonic.net/
Adjustments and Settings for Recording Chromatic Aberration Compensation (CAC)
Supporting lens model No.
HA16x 6.3BERM-M58
HA22x 7.8BERM-M58
HJ17ex 7.6B IASE
HJ22ex 7.6B IASE
CAC operation
For the four lenses listed on the left
Install the lens on the unit and connect the
lens connector.
If the lens product number recorded on the unit
coincides with the product number of the connected
lens, the CAC data stored in the unit are read out
automatically.
Confirmation of the CAC operation status
When the MENU is not displayed on the VF
screen, pull the MARKER SEL, MODE CHK /
MENU CANCEL switch.
If letters of the CAC are indicated at the left top of the
viewfinder screen, the CAC is operating properly. If the
letters of CAC are not indicated, the CAC is not
operating.
The menu item CAC is found in the <VF
INDICATOR> screen on the VF page.
The letters of CAC are indicated in the left top of the
viewfinder screen.
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