Views: 0 Author: Site Editor Publish Time: 2026-07-10 Origin: Site
Not every endoscope device needs 1080P, 5MP or ultra-wide-angle imaging.
In many maintenance tools, machinery inspection devices and compact visual checking systems, the user needs answers to much simpler questions:
Is the channel blocked?
Is a component in the correct position?
Is there a visible foreign object?
Is an internal structure damaged?
Can the operator see the target clearly at close range?
For these applications, camera selection should begin with the inspection task rather than the largest resolution number.
The SF-SJN345 D4.5 is a compact integrated USB endoscope camera module using the BF20A6 sensor. It provides YUV 640×480@30fps output, integrates 6 LEDs, offers a 72° field of view and supports a 20–60mm focusing range.
Its strongest value is straightforward: compact close-range visualization for OEM devices that need practical live viewing rather than high-detail imaging.
Many customers make one of two mistakes when selecting an endoscope camera.
The first mistake is choosing the smallest possible diameter without checking whether the image is usable.
The second mistake is choosing unnecessarily high resolution for a task that only requires basic visual confirmation.
Both approaches can create unnecessary development problems.
The SF-SJN345 D4.5 is positioned between these extremes. It provides a D4.5 camera structure with built-in lighting and USB output for basic inspection tasks.
The better question for customers is not:
“Is 0.3MP high enough compared with other cameras?”
The better question is:
“Can 640×480 live video show the information our operator actually needs?”
The SF-SJN345 D4.5 is an integrated USB endoscope camera module with the following confirmed characteristics:
D4.5 camera diameter
BF20A6 sensor
0.3MP imaging class
Integrated structure
USB output
YUV format
640×480@30fps
6pcs LEDs
Plastic lens
72° FOV
20–60mm focusing range
No dimming
Type-A connection
The current catalog does not specify IP67, cable length, front length or main board size for this model. These requirements should be confirmed separately when they are important to the project.
Many inspection tasks are decision-based.
The operator wants to answer:
Is something there?
Is something missing?
Is a passage blocked?
Is the position correct?
Is there visible contamination?
Is an obvious defect present?
For these tasks, a basic real-time image may be enough.
The SF-SJN345 D4.5 supports 640×480@30fps output. It should be evaluated for practical visual confirmation rather than fine measurement, small-defect classification or high-resolution documentation.
This distinction helps customers avoid paying for image performance that the final application does not use.
A camera sensor alone cannot solve a dark cavity.
The SF-SJN345 D4.5 integrates 6 LEDs to provide local illumination near the camera head.
This is useful for enclosed spaces where external light cannot easily reach the target.
However, LED quantity alone does not guarantee perfect lighting.
Customers should still test:
Target reflectivity
Working distance
Cavity size
Surface color
Shadow areas
Potential overexposure
Because the module does not support dimming, the real target material should be tested before sample approval.
Wide-angle cameras are useful for navigation, but wider is not always better.
The SF-SJN345 D4.5 provides a 72° FOV.
This relatively focused viewing direction can be useful when the user wants to observe a specific target area rather than maximize surrounding scene coverage.
For example, customers may prefer a more controlled view when checking:
A specific component
A connection point
A blockage area
A local surface condition
A defined internal structure
The suitability of 72° should still be evaluated together with the 20–60mm working distance.
This is often a working-distance problem.
The listed focusing range is 20–60mm.
If the target is normally 5mm from the lens, this model may not be the right optical choice.
If the target is normally 100mm away, the same issue applies.
Customers should measure the actual camera-to-target distance before ordering samples.
A useful evaluation should include:
Minimum normal distance
Typical operating distance
Maximum expected distance
Whether the distance changes during use
This helps prevent rejecting a technically suitable camera simply because the wrong optical distance was selected.
This model uses USB output and the catalog lists a Type-A connection.
For OEM customers, USB can provide a practical evaluation path when the host device is designed around a compatible USB camera workflow.
However, connector form alone should not be treated as a complete compatibility guarantee.
Customers should test the module with the actual:
Host device
Operating environment
Viewing software
Power architecture
Application workflow
before final confirmation.
The catalog lists the module as an ALL integrated type.
For customers, this means the product should be evaluated differently from a separate-type camera head and remote main board arrangement.
An integrated structure can be useful when the project prefers:
A simpler front-end architecture
Compact device assembly
Reduced camera-to-board structural separation
Straightforward integration into a dedicated inspection tool
However, “integrated” does not mean “finished product.”
The customer still needs to evaluate the complete housing, cable, mechanical protection, environmental protection and final device design.
The SF-SJN345 D4.5 can be evaluated for:
Machinery internal observation
Automotive maintenance inspection
Equipment cavity checking
Appliance repair tools
Basic pipe or tube observation
Component position checking
Portable USB inspection devices
OEM visual maintenance tools
Educational and demonstration inspection systems
It is better positioned for basic visual inspection than applications requiring fine diagnostic detail, precision measurement or AI-based defect recognition.
Choose this model when the project needs:
D4.5 compact camera head
USB output
640×480@30fps basic live visualization
Built-in LED illumination
72° focused viewing direction
20–60mm working distance
Integrated camera structure
Type-A connection
Simple OEM inspection device integration
It is especially suitable when the customer knows exactly what the operator needs to see and high-resolution imaging is not necessary.
Another module may be better when the project needs:
1080P or higher image detail
Very close focus below 20mm
Longer observation distance beyond 60mm
Ultra-wide FOV for navigation
LED brightness adjustment
Confirmed IP67 waterproof support
AI inspection
Measurement-level analysis
High-resolution documentation
The correct decision should be based on the inspection task.
After receiving samples, customers should test:
Image clarity at the real working distance
Visibility of the actual target
LED brightness in the real cavity
Reflection on metallic or glossy surfaces
72° FOV coverage
Live image stability
Host compatibility
Type-A system integration
Mechanical fit
Environmental protection requirements
The test target should be the real component or a realistic simulation—not only a printed chart on a desk.
Before requesting a quotation, provide:
Application scenario
Target object
Cavity size
Required camera diameter
Typical working distance
Minimum and maximum viewing distance
Image detail requirement
Target surface material
Lighting environment
Waterproof requirement
Host device
USB system information
Sample quantity
Estimated production volume
Mechanical structure information if available
The SF-SJN345 D4.5 is a compact USB endoscope camera module for basic close-range visual inspection.
Its value is not based on high resolution.
Its real value is the practical combination of D4.5 diameter, USB output, 640×480@30fps live video, local LED illumination, 72° FOV and a defined 20–60mm working range.
For customers who need reliable visual confirmation rather than unnecessary image complexity, this module can be a practical OEM imaging option.
Need a compact USB endoscope camera module for basic close-range inspection?
Send your application, target size, real working distance, surface material and host system information to SincereFull. Our team can help evaluate whether SF-SJN345 D4.5 matches the actual inspection task.
