Adjusting The Back Focus - JVC TK-C9200EX Instructions Manual

Setting/Adjustment

Adjusting the Back Focus

This camera is adjusted to an optimum wide range before shipment but
readjustment is required when using zoom lens or when the lens focus ring is out
of focus.
Back focus adjustment ring
Lens focus ring
.
With a Fixed-Focus Lens
If the focus cannot be adjusted correctly with the lens focus ring, adjust the back
focus as follows.
1 Loosen the back focus fastening screw by turning it anti-
clockwise with a + screwdriver.
2 Shoot some fine patterns on the subject or away from the subject.
3 Turn the lens focus ring to ∞.
4 Turn the back focus adjustment ring to get the best focus.
5 Tighten the back focus fastening 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 fastening screw by turning it anti-
clockwise with a + screwdriver.
2 Shoot some fine patterns on the subject or away from the subject.
3 Zoom to the maximum telephoto position and turn the lens
focus ring to adjust the focus.
4 Zoom to the maximum wide angle position and turn the back
focus adjustment ring to adjust the focus.
5 Repeat steps 3 and 4 two or three times.
6 Tighten the back focus fastening screw by turning it clockwise.
When the subject is bright and an ND filter is used, back focus
Memo
adjustment can be performed more accurately. (An ND filter is a filter
that reduces light incident on the lens of all wavelengths equally.)
Use the focus adjust mode for easy focusing. (A page 13)
12
Tighten
Loosen
Back focus fastening
screw (M2)