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Adjustments and Settings for Recording
: Chromatic Aberration Compensation (CAC)
Adjustments and Settings for Recording
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.
Chromatic aberration means magnification ratio chromatic
aberration. Magnification ratio chromatic aberration is
caused by differences in the 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.
To correct the chromatic aberration, record the chromatic
aberration characteristics of the lens for the zooming ratio,
iris, and focal distance in the unit 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 4 kinds of lenses are stored
in the unit at the time of shipment from the factory.
Note
After the release of this unit, visit our Web site at the address
given below for details on new lenses compatible with this
function and any changes in this function.
https://eww.pavc.panasonic.co.jp/pro-av/
For the 4 lenses listed on the left
1 Install the lens on the unit and connect the lens
connector.
2 Open the <CAC ADJ> screen on the MAINTENANCE
page.
3 Turn on the CAC CONTROL.
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.
1 When the menu is not displayed on the viewfinder
screen, press the MODE CHECK button.
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.
2 Open <VF INDICATOR2> screen on the VF page and
set the menu option CAC to “ON”, and then the letters of
“CAC” are indicated in the left top of the viewfinder
screen.
Chromatic Aberration Compensation (CAC)
What is the chromatic aberration?
Chromatic aberration compensation function
Indication on the unit Supporting lens model No.
HA166.3BERM-M58 HA166.3BERM-M58
HA227.8BERM-M58 HA227.8BERM-M58
HJ17e7.6B IASE HJ17E7.6B IASE
HJ22e7.6B IASE HJ22E7.6B IASE
B
G
R
CAC operation
Confirmation of the CAC operation status
AJ-HPX2700G-VQT1V27_eng.book 103 ページ ２００８年９月２日 火曜日 午後５時４３分