The core difference between autofocus (AF) and fixed focus camera modules in application lies in the difference in focusing ability, which directly leads to the differentiation of their applicable scenarios. The following are detailed application differences:
1. Differences in core competencies
Auto focus (AF) module:
By driving the lens with motors (such as voice coil motor VCM, stepper motor, etc.), the focal length is adjusted in real-time to achieve clear imaging of the target object. Need to cooperate with focusing algorithms (such as contrast detection, phase detection, laser/TOF assistance).
Fixed focus module:
The focal length of the lens is fixed at the factory and cannot be dynamically adjusted. By relying on a small aperture and a large depth of field design, objects within a certain distance range appear relatively clear.
2. Comparison of typical application scenarios
(1) Auto focus (AF) module applicable scenarios
Intelligent terminal: shooting close-up (macro, document), portrait blurring, quick capture, relying on AF to adjust focus in real time.
High end video conference camera: AF maintains clear facial features when the speaker moves or multiple people switch.
Biometric recognition (facial/fingerprint payment): adapts to different distances and angles, improves recognition accuracy and security.
Industrial inspection (PCB, precision parts): requires precise focusing on the inspection surface, fixed focus cannot meet the requirements.
Medical imaging (endoscope, diagnostic equipment): Real time tracking of lesions to ensure clear imaging.
Drone gimbal camera: Quickly focus during high-speed motion or altitude changes.
(2) Applicable scenarios of fixed focus module
Security monitoring (wide-angle camera): Large range monitoring, sufficient depth of field to cover distant views, low cost and stability.
Driving recorder: mainly captures road scenes several meters away, with sufficient depth of fixed focus and high temperature vibration resistance.
Fixed distance barcode scanner (such as supermarket checkout counter): The barcode distance is fixed, the focusing speed is fast, and the cost is low.
Low end toys/IoT devices: cost sensitive, only need to be “visible”.
Simple doorbell camera: Low power consumption, long-term standby without frequent focusing.
How to choose?
AF
-Close up shooting, blurring effect (fixed focus cannot achieve clear focus at close range and background blur effect)
-Significant changes in target distance, such as facial tracking (dynamically adjusting focus to avoid blurring)
-Industrial precision measurement (requiring millimeter level focusing accuracy)
FF：
-Ultra low cost, mass production (AF motor and algorithm increase costs)
-Fixed distance shooting, such as scanning codes (no need for focusing, faster response)
-High temperature/vibration environment (AF motor may fail due to environmental factors)
-Ultra low power consumption devices, such as battery powered (AF drive motor consumes power, fixed focus module has longer battery life)
Select AF module: for scenes that require flexible focusing, high definition, and close range shooting (such as mobile phones, medical, industrial testing).
Select focal mode group: cost sensitive, fixed distance, low-power or harsh environmental applications (such as monitoring, scanning, driving recorder).
Whether you need a flexible and precise autofocus module or a cost-effective, stable and durable fixed focus solution, we can provide professionally matched camera modules!
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