Description
Article no.: 28538
NiSi Filter UV SMC L395 39mm – Ultra-thin 3 mm UV cut below 395 nm
What this filter does
The NiSi Filter UV SMC L395 for 39mm lenses cuts ultraviolet light under 395 nm. It reduces UV transmission while preserving visible light, and therefore helps maintain image clarity in situations where UV can affect results.
Design and build
NiSi uses high quality Japanese optical glass for the filter element. The frame is made from high quality aluminum and has a thinness of only 3 mm. In fact, the product description states this is the thinnest frame in the world so far. As a result, the ultra-thin design fits even super wide angle lenses to avoid vignetting and reflections.
Additionally, the frame receives superfine dull polishing and features elaborate knurling. These treatments help ensure that the frame will not blanch because of repeated rotation. Furthermore, a screw thread in front of the frame makes it easy to install the lens cap and attach other accessories.
Coatings and surface treatments
- Multi-coating on both sides of the filter, which reduces reflections and improves light transmission.
- Hard waterproof and oil repellent coating on the outer side to resist water and oil and to support easier maintenance.
- Highly smooth surface finishes that support low reflection and consistent optical performance.
Practical benefits
- Minimizes vignetting on wide angle and super wide angle lenses thanks to the ultra-thin 3 mm frame.
- Protects the front element of the lens from dust and physical damage.
- Easy to clean due to the waterproof and oil repellent outer coating.
- Screw thread on the front allows use of lens caps and other standard accessories without complications.
Standards and safety
All materials used in this filter meet the European Union's environmental protection requirements under RoHS (Restrictions on Hazardous Substances). The product contains nothing hazardous according to those standards.
Specifications
| Specification | Value |
|---|---|
| Product | NiSi Filter UV SMC L395 |
| Diameter | 39 mm |
| UV cut-off | Under 395 nm |
| Frame thinness | 3 mm (ultra-thin) |
| Transmittance | >98.3% |
| Reflection | 0.5% |
| Frame material | Aluminum |
| Coating | Multi-coating on both sides; hard waterproof and oil repellent coating on outer side |
| Standards | RoHS compliant (Restrictions on Hazardous Substances) |
FAQ
Question: Will this filter cause vignetting on wide angle lenses?
Answer: The NiSi UV SMC L395 uses an ultra-thin 3 mm aluminum frame designed to minimize vignetting, and the description states it fits even super wide angle lenses to avoid vignetting and reflections.
Question: How does the filter affect image transmission and reflections?
Answer: The filter uses high quality optical glass with multi-coating on both sides, offering high transmittance (>98.3%) and low reflection (0.5%), which helps preserve image brightness and reduce unwanted reflections.
Question: Is the front of the filter suitable for lens caps and accessories?
Answer: Yes. The filter frame includes a screw thread on the front, which makes it easy to install a lens cap and to attach other compatible accessories.
Question: How resistant is the filter to water, oil and dirt?
Answer: The outer side has a hard waterproof and oil repellent coating, and the surface is described as easy to clean, which helps when removing dust or contaminants.
Question: Are the materials environmentally compliant?
Answer: All materials used meet the European Union RoHS requirements, and the product description states they contain nothing hazardous under those standards.