Back Focus Adjustment - JVC TK-C1480B Manuel D'instructions

Back focus adjustment

Back focus adjustment
Be sure to make back-focus adjustments when changing the lens mounting method or using
a different lens. If required, adjust it as follows:
Back focus
adjusting ring
Loosen
Lens focus ring
MEMO
• LENS FOCUS ADJUSTMENT MODE
At the time of focus adjustment, press the
button at the side of the unit for at least
one second to open the lens iris and to fa-
cilitate focusing. At this time, "LENS FOCUS
ADJUSTMENT MODE" will be displayed on
the monitor screen.
When the adjustment has been completed,
press one of the buttons
cel focus adjustment mode.
• When the subject is bright, the use of an
ND filter permits more accurate back-focus
adjustment. (The ND filter reduces the
amount of incident light upon the lens
equally over the entire range of wavelength.)
Tighten
Back focus fixing
screw (M2.6)
to can-
• With a fixed-focus lens
If the focus can not be adjusted correctly by
rotating the lens focus ring, adjust the back
focus as follows.
1.
Loosen the back focus locking screw by
turning it counterclocckwise (
screwdriver.
2.
Shoot a pattern closely.
3.
Turn the lens focus ring to .
4.
Turn the back focus adjustment ring to
focus at the best point.
5.
Tighten the back focus locking screw by
turning it clockwise (
• With a zoom lens
If the image is out of focus when zooming
(telephoto wide-angle), adjust the camera as
follows:
1.
Loosen the back focus locking screw by
turning it counterclocckwise (
screwdriver.
2.
Shoot a comparatively dark scene with
thin lines.
3.
Set the lens to the maximum telephoto
position, and adjust the lens focus.
4.
Set the lens to the maximum wide-angle
position, and turn the back focus ring to
adjust the focus.
(Repeat steps 3. and 4. two or three
times.)
5.
Tighten the back focus locking screw by
turning it clockwise (
) with a
).
) with a
).
E-21