FILTER SERIES
Various Types of Filters
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Lens Protective Cover
(Lens Protection and UV-Cut Property)
Filter (cover glass) which protects the lens and reduces UV light. Designed with a suitable thread to be mounted directly onto the lens. Please note that lens with a wide-angle field of view may be interfered. In addition to the UV series, cover glass made of transparent and colorless glass is also available.
| Model | Filter Thread Size | Dimensions |
|---|---|---|
| (mm) | φ(mm) | |
| UV-255 | M25.5×P0.5 | D27.5×4.5 |
| UV-270 | M27×P0.5 | D29×4.5 |
| UV-305 | M30.5×P0.5 | D32×4 |
| UV-340 | M34×P0.5 | D36×6.5 |
| UV-405 | M40.5×P0.5 | D42×7 |
Polarized Filters
(Linear Polarization of Light)
Filter which only allows passage of linearly polarized light of a specific orientation. Ready to be mounted directly onto the lens. Please note that the orientation of polarization can not be adjusted.
| Model | Filter Thread Size | Dimensions |
|---|---|---|
| (mm) | φ(mm) | |
| PL-255 | M25.5×P0.5 | D27.5×4.5 |
| PL-270 | M27×P0.5 | D29×4.5 |
| PL-305 | M30.5×P0.5 | D32×4.5 |
| PL-340 | M34×P0.5 | D36×6.5 |
| PL-405 | M40.5×P0.5 | D42×7 |
Polarized Filters
(Rotational Type)
Filter which allows passage of only linearly polarized light of a specific orientation. Can be mounted directly onto the lens. The orientation of polarized light can be manually adjusted directly on the lens.
| Model | Filter Thread Size | Dimensions |
|---|---|---|
| (mm) | φ(mm) | |
| PL-255K | M25.5×P0.5 | D28.0×7.5 |
| PL-270K | M27×P0.5 | D29×7.5 |
| PL-305K | M30.5×P0.5 | D32×7.5 |
| PL-340K | M34×P0.5 | D36×9 |
| PL-405K | M40.5×P0.5 | D42×10 |
Customized Filters
Filters are mainly classified into absorption type filters called color glass and thin film filters made by vacuum evaporation.
[Color glass filter]
The glass itself has various spectral transmission characteristics, and it is mainly used for applications such as wavelength band separation and full range attenuation.
[Vacuum Deposition Filter]
Custom made filters are available based on desired specifications such as wavelength, angle and polarization. High precision filtering is possible where color filters are deemed less than sufficient.
