Sigma
Sigma AFL-940 46mm EX DG UV Multi-Coated Filter
★★★★★
Enhance Your Photos with the Sigma AFL-940 UV Filter The Sigma AFL-940 46mm EX DG UV Multi-Coated Filter is designed to enhance your photography by blocking ultraviolet light, reducing haze, and protecting your lens. Ideal for shooting in high altitudes, marine environments, and areas with clean ...
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Overview
Enhance Your Photos with the Sigma AFL-940 UV Filter
The Sigma AFL-940 46mm EX DG UV Multi-Coated Filter is designed to enhance your photography by blocking ultraviolet light, reducing haze, and protecting your lens. Ideal for shooting in high altitudes, marine environments, and areas with clean air, this filter improves image clarity and color rendition.
Specifications:
- Brand: Sigma
- Model: AFL-940
- Size: 46mm
- Type: Ultraviolet (UV)
- Coating: Multi-Coated
- Effect: Reduces Excessive Blue, Cuts Through Haze, Improves Image Clarity, Protects Front Element of Lens
Key Features
Multi-coated filter designed to protect lens from dust, moisture, and scratches
Corrects for ultraviolet light, which often leaves bluish cast on photo
Ideal for mountain and marine environments with distracting haze
Can be left on lens all day long for protection; glass construction
Fits lenses with 46mm threads; 1-year warranty
Specifications
Model
AFL-940
Filter Size
46mm
Filter Type
UV Multi-Coated Filter
Material
Glass
Protection Feature
Dust, moisture, scratches
Benefit
Corrects ultraviolet light, reduces haze
Warranty
1-year
Pros & Cons
👍 Pros
- Features a multi-coated design, engineered to protect the lens from dust, moisture, and scratches.
- Specifically corrects for ultraviolet light, which often imparts an undesirable bluish cast on photos.
- Ideal for use in mountain and marine environments where distracting haze is prevalent, improving clarity.
- Can be left on the lens all day, providing continuous protection without needing to be removed.
- Constructed with glass, indicating durability and optical quality for consistent performance.
👎 Cons
- The specific optical transmittance percentage or UV reduction capability is not detailed, limiting precise technical understanding.
- The filter's thickness is not specified, which could be a factor for vignetting on wide-angle lenses.
- As a 46mm filter, its compatibility is limited to lenses with exactly 46mm front filter threads.
- The "Multi-Coated" feature is general; specific coating types or number of layers are not mentioned, affecting anti-reflective performance expectations.
- While it corrects for UV, it doesn't offer additional benefits like polarization or neutral density, which other filters might provide.
Frequently Asked Questions
What is the primary benefit of a multi-coated UV filter like the Sigma AFL-940?
The primary benefit of the multi-coated Sigma AFL-940 UV filter is its ability to protect the lens from dust, moisture, and scratches while also correcting for ultraviolet light to prevent a bluish cast in photos.
Can this 46mm filter be used on any camera lens?
This Sigma AFL-940 filter is specifically designed for lenses with 46mm front filter threads; it will not fit lenses with different thread sizes.
How often should I clean the UV filter if I leave it on my lens all day?
While designed for continuous protection, it is advisable to clean the filter regularly, similar to your lens, to maintain optimal image clarity, especially if exposed to dust or moisture.
Does this filter affect the exposure of my photographs?
UV filters are generally designed to be optically neutral and should not significantly affect exposure, though multi-coated filters can minimally reduce light transmission.
What does "corrects for ultraviolet light" mean in practical terms for my photos?
Correcting for ultraviolet light means the Sigma AFL-940 filter helps eliminate the often invisible UV radiation that can cause a bluish cast and reduce sharpness in outdoor photographs, especially in bright, hazy conditions.
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