1. What should we test first after receiving SF-SJT720?
Test whether the three-lens viewing direction actually matches the target surfaces in your real device.
2. Should we test it only on a desktop?
No.
A desktop test cannot prove whether the three-lens view works inside a pipe or cavity.
3. Why is real-cavity testing important?
Because target distance, reflection, lighting balance and viewing direction can change inside a real cavity.
4. How should we test the 20–60mm focus range?
Place the camera at the closest, typical and farthest expected target distances for each useful viewing direction.
5. Can one lens direction be clear while another is not?
It may happen if the target distance or lighting differs by direction.
This should be checked during sample testing.
6. What should we test about lighting?
Test LED brightness, reflection, shadows and whether all required viewing directions are adequately illuminated.
7. What if the image has glare?
Because dimming is No, customers may need to adjust surface distance, lighting geometry or evaluate another model.
8. Can we use this module in wet environments?
Not as a confirmed waterproof module.
IP67 is marked No.
9. Can the final device still be sealed?
Possibly, but the final sealing design and validation belong to the complete device.
10. What should we confirm about Type-A connection?
Confirm host USB support, software compatibility, power supply, YUV / MJPEG handling and mechanical connection.
11. Can it connect directly to every PC?
No.
Host compatibility should always be tested.
12. What if the customer needs Type-C?
The catalog lists Type-A for this model.
Type-C needs should be discussed separately before sample selection.
13. What if we need confirmed resolution and frame rate?
Ask for confirmation before publishing final specs or approving the design.
The catalog snippet does not clearly list them.
14. What if the D7.9 diameter is too large?
Evaluate a smaller-diameter module, but understand that multi-lens structure may involve diameter trade-offs.
15. What if the inspection only needs one direction?
A single-lens module may be more suitable and simpler.
16. What if the target is farther than 60mm?
Evaluate another model with longer focusing range.
17. What if the target is closer than 20mm?
Evaluate another close-focus module.
18. What should be included in the sample test report?
Include target direction, working distance, lighting result, host device, image output behavior, mechanical fit and any waterproof requirement.
19. When is SF-SJT720 a strong candidate?
It is strong when the device needs multi-angle viewing, D7.9 size is acceptable, working distance is 20–60mm and waterproof is not required.
20. When should we choose another module?
Choose another model when the project needs IP67, dimming, higher resolution, smaller diameter, longer focus range or single-view simplicity.
Key Takeaway
SF-SJT720 sample approval should focus on real multi-angle inspection performance, not only whether the camera outputs an image.
