Featuring a unique 15-layer multi-coated design, the 49mm Firecrest SuperSlim Circular Polarizer Filterhelps to reduce reflections and glare as well as increase the overall saturation of an image. This unique polarizer filter is characterized by the advanced Firecrest coating, which offers full attenuation of UV light for increased clarity and contrast, as well as a marked reduction in surface reflections and protection against scratching.

A polarizing filter helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface. This results in a noticeable increase in the saturation of skies and foliage, as well as clearer imagery when photographing in hazy conditions. A circular polarizer differs from a linear polarizer in that it supports full use of a camera's autofocus and auto exposure functions.

The SuperSlim aluminum alloy filter ring measures 7.5mm-thick and its slim design helps to minimize the likelihood of vignetting. This filter features front threads for stacking additional filters or attaching a lens cap.

Minimize Reflections and Glare    Reduces Haze and Blue Cast in Landscapes    Enhances Color and Tonal Saturation    15-Layer Firecrest Multi-Coating    Neutral Results Across All Spectrums    Hydrophobic and Scratch-Resistant    Schott Superwite Glass, Aluminum Ring    Stackable Filter Ring, 7.5mm-Thick

Reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface.

Arrange and filter directionally polarized light perpendicularly to the reflected light allowing for the absorption of much of the light.

Lessens haze in distant landscapes and provides more saturated, vivid colors.

Strongest effect when used at a 90° from the sun.

The 15-layer Firecrest coating has been applied directly to the filter glass by way of a vacuum-formed, hard-coated, electrolytic process. The multi-coating is water- and scratch-resistance for greater overall durability.

Firecrest coating attenuates UV contamination, as well as surface reflections, for increased contrast, clarity, and acuity.

Schott Superwite glass is used in order to maintain clear image quality and high light transmission.

The aluminum alloy SuperSlim filter ring measures 7.5mm-thick and features front threads for stacking additional filters.

Related Questions and Answers

Q: 1. What are those index marks on the filter ring mean?

A: The index marks do not have a specific number but can help you get to the same position.

Q: 2. does this fit a sony sel55210 lens?

A: The Sony E 55-210mm lens uses a 49mm filter. The Hoya 49mm NXT Plus Circular Polarizer Filter, BH # HOCPNP49 is a great alternative. https://bhpho.to/3fMdm0B

Q: 3. Anyone used this on the Venus Laowa 17mm f/4?

A: It will fit perfectly on the Laowa 17mm f/4 GFX Zero-D lens, but, with such a wide focal length, there's a possibility some vignetting may occur when using this filter.

Q: 4. What is the filter factor, i.e. how many stops of light are reduced?

A: The filter factor of the Sony 82mm T* Circular Polarizer Filter is 1.6x, i.e., 3 stops of light are reduced.

Q: 5. Will this filter fit a 39mm drop in filter for a Nikon F4 600 mm lens?

A: No, that filter will not fit in Nikons two versions of the 600mm lens.The two 600mm lenses are the, Nikon AF-S NIKKOR 600mm f/4E FL ED VR Lens B&H # NI6004EEDVR MFR # 20054AndNikon AF-S NIKKOR 600mm f/4G ED VR Lens B&H # NI6004GEDVR MFR # 2173The f/4E uses a 40.5mm drop in and the f/4G uses a 52mm drop in filter.The recommend polarizing filters are below.

Q: 6. How well does this filter work on a super wide angle, 11-16mm? Thank you!!!SuperSniperSal

A: I use this on the Tokina 11-16 2.8. At 11mm, you get some minor vignetting, but not a showstopper by any stretch.

Q: 7. What is the filter factor of this filter? One stop or more?

A: B+W does not publicly publish this information in any of their data sheets, but independent testing yielded a loss of approximately 1.5-stops of light when using the B+W high-transmission MRC-Nano Master CPLs.

Q: 8. What is the difference between this and a Kaesemann polarizer? B&H doesn't sell Kaesemann in 62mm, but this costs the same.

A: The Kaesemann series filters are currently being phased out. We have no 62mm size left and soon other sizes will be gone too. The Master series has the same optical quality at the prior Kaesemann series but they added a better grip due to optimized filter ring knurling and it is grease-free for easy rotation.

Q: 9. Does it come with a protective cap that works with it?

A: Unfortunately it does not include a protective cap.

Q: 10. Does this come with a plastic case or only the pouch that's pictured?

A: Unit comes in a filter storage pouch and is packaged in a black cardboard case.