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Chapter 4 Adjustments and settings for recording
(continued)
4-10-7 Lens file
The built-in memory of the unit stores eight sets of lens files.
On the SD memory card, eight titles for eight sets of lens
files in a table (total 64 sets) can be written.
The following data are recorded on the lens file.
O Title name
O White shading correction value
O Flare compensation value
O RB gain offset correction value
4-10-8 How to provide lens files
Adjustment of white shading
For the white shading adjustment, refer to 5-3 Adjusting the
white shading of the lens.
Adjustment of the flare
Using the menu operations, open the <LENS FILE ADJ>
screen from the MAINTENANCE page and adjust the flare in
the LENS R FLARE item, the LENS G FLARE item and the
LENS B FLARE item.
Adjustment of gain offset
For correcting changes in white balance that may occur
when replacing the lens.
Example of the chart for flare adjustment
#
< LENS FILE ADJ >
RB GAIN CTRL RESET:ON
LENS R GAIN OFFSET:+000
LENS B GAIN OFFSET:+000
LENS R FLARE :000
LENS G FLARE :000
LENS B FLARE :000
0.1L
0.1H
1
Mount the lens as standard on the unit.
2
Shoot the grayscale chart with appropriate lighting (2000
lx, 3200 K are preferable).
3
Set the WHITE BAL switch to the A position.
4
Adjust the lens aperture so that the white window at the
center of the grayscale chart is about 80%.
5
Push the AUTO W/B BAL switch to AWB to adjust the
white balance automatically.
6
Measure the signal level of RGB by using the waveform
monitor (WFM).
7
Replace the lens to one where a lens file is provided.
8
Adjust the lens aperture so that the signal level of Gch is
the same signal level as the one obtained in
6 above.
10
Adjust the signal level of Rch to be the same as Gch in
the LENS R OFFSET item.
9
Using the menu operations, open the <LENS FILE ADJ>
screen from the MAINTENANCE page and set the RB
GAIN CTRL RESET to ON.
11
In the same way, adjust the signal level of Bch to be the
same as Gch in the LENS B OFFSET item.
01.AJ-HDX900_P_E(VQT0X86)_E 06.6.22 12:52 PM ページ74
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