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Difference Between PL (Polarizing Filter) & CPL (Circular Polarizing Filter)
- Working Principle: PL uses a linear polarizing film to block polarized light in a single direction; CPL adds a quarter-wave plate to convert linear polarized light into circular polarized light, avoiding light interference.
- Application Scenarios: PL is suitable for simple optical devices (e.g., basic cameras, industrial detectors) and non-autofocus systems; CPL is ideal for modern cameras, camcorders, and autofocus/auto-exposure equipment, as it does not affect the camera’s internal metering and focusing systems.
- Compatibility: PL may cause incorrect metering or focusing in autofocus cameras; CPL is fully compatible with autofocus and auto-exposure systems, with wider applicability.
| Size of glass | 12mm~198mm or OEM as needed |
| Mount | P0.5/0.75mm |
| Mount with screw | M25.5~M58 |
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