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How to Distinguish Auto Iris,Manual Iris and P-Iris

There are four types of operation for lens iris as follow

(1) DC drive auto iris

(2) Video drive auto iris

(3) Manual iris

(4) P-iris

For DC drive type, the iris is controlled by the circuit inside the camera;

For Video drive type, the iris equipped with an amplifier is operated by the video signal and DC power supply;

For Manual type, the iris is manually adjusted through the adjusting ring on the lens;

For P-iris type, the iris is precisely controlled by stepping motor, which optimizes the space and scope of iris opening under all lighting conditions in favor of generating better contrast, clarity, resolution and depth of view.

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