15
Lens adjustments and checks
The flange back (distance from the lens mounting surface to the
image formation surface) is adjusted when a subject cannot be
brought into focus precisely using either the telephoto or the wide
angle positions when performing zoom operations.
Once the flange back has been adjusted, it need not be re-adjusted
unless the lens is replaced. For details on the adjustment method
and lens positions, refer to the operating instructions of the lens
concerned.
Flange back adjustment
<Note>
Coloring may occur in the vertical direction near the open setting of
the lens iris even when the white shading has been adjusted. This
phenomenon is a characteristic inherent to lenses and optical
systems, and it is not indicative of a failure.
White shading adjustment
This unit enables the fixed data supporting three types of lens and
the data supporting any desired adjustments to be used for white
shading compensation. This data can be selected using LENS
SHADING on the sub-menu (see page 35).
First, check that the type of lens used and the settings match. The
fixed data settings are as follows:
Type A: Data for S18
k
6.7BERM4 (etc.) lenses.
Type B: Data for YH18
k
6.7KRS (etc.) lenses.
Type C: Data for S14
k
7.3BRM lens.
If the lens to be used does not correspond to any of these types,
proceed to adjust the white shading described below by performing
menu operations.
White shading check
SHUTTER
switch
GAIN: L (0 dB)
AWB memory
selector switch
AUTO W/B BAL
switch
1
Proceed with the camera settings for the
adjustment.
4
Repeat the operation in step
2
-
2
2
.
JOG dial button
MENU button
2
Proceed with the image settings.
1
Shoot a piece of paper with no color unevenness.
2
Set the lens iris to manual, and adjust it so that a zebra
pattern fills the whole screen. Check that the lens iris is
between f/4 and f/11.
<Notes>
≥
Flicker tends to occur under fluorescent lights, mercury lamps
and other such lighting conditions. Use sunlight, halogen
lamps or a light source which rarely give rises to flicker.
≥
If there is unevenness in the lighting, the zebra pattern will no
longer appear on some parts of the screen. In this situation,
adjust the lighting position, etc.
≥
Adjust the lighting position, etc. also when the lens iris is not
between f/4 and f/11.
≥
The electronic shutter must be left at the OFF setting.
3
Adjust the white balance and black
balance.
1
Set the WHITE BAL selector switch to A or B, and use the
AUTO W/B BAL switch to execute the automatic white
balance adjustment (AWB).
2
Use the AUTO W/B BAL switch to execute the automatic
black balance adjustment (ABB).
3
Once again, use the AUTO W/B BAL switch to execute the
automatic white balance adjustment (AWB).
1
Mount the lens on the camera.
Do not forget to attach the lens cable.
2
Set the electronic shutter to OFF and the gain to L (0 dB).
3
If the lens comes with an extender, disengage the extender
function.
4
Proceed with the menu operation (page 30) to open the sub-
menu <LENS SHADING> screen, and set “LENS SELECT”
to USER.
5
Proceed
with
the
white
shading
adjustment.
1
Proceed with the menu operation (page 30), and open the
sub-menu LENS SHADING screen.
2
Turn the JOG dial button to align the cursor with LENS
SELECT, and press the button. Then turn the JOG dial
button further to align the cursor with USER, and press the
button to select this item.
3
Use the JOG dial button to align the cursor with SHADING
(USER), and select this item.
ACTIVE appears on the screen to indicate that the white
shading is being automatically adjusted. The adjustment is
completed when the ACTIVE display is cleared and OK
appears.
4
Press the MENU button to close the menu screen.
6
If the lens comes with an extender, engage
the extender function, and repeat steps
2
through
5
.
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