Step 6: Click on “Finish” to complete the installation.
18. Back Focus Adjustment
When to adjust the back focus:
Back Focus refers to the distance from the rear lens element to the camera focal plane. It is only required to
adjust the back focus only when the focus cannot be adjusted throughout its zoom range.
Requirements:
Tools required when carrying out back focus adjustment include:
1. Back focus adjuster (in the package of the IP camera)
2. Test chart / contrasting object
How to adjust the back focus:
Step 1: Set the camera on a stable mount, with the test chart or object at least 75 feet (23 meters) away (or as far
as possible). Please loosen the focus ring´s retaining screw with the supplied back focus adjuster.
Step 2: Make sure the iris is wide open. Therefore, it is advised to keep the environment in low light condition. To
open the automatic lens completely, please use a neutral density filter. With this filter it is possible to simulate a
low light condition so that the lens can open up completely.
Step 3: Adjust the focus to in
fi
nite far (
∞
).
Step 4: Turn the zoom to the wide angle (telephoto) position, and then focus with the back focus on the subject.
Step 5: Set the zoom to the most extreme wide angle (telephoto) position.
Step 6: Focus on the object with the back focus ring. Check now whether it is possible to adjust the focus with
the back focus ring also in the wide angle range.
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Summary of Contents for GCI-H0503B
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