JVC TK-C9510E Manuel D'instructions page 29

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, using ND filter enables acculate
Memo
back focus adjustment. ( 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. "Fine-tuning
the Focus" (A page 30)
Setting/Adjustment
E-29