The Sigma 82mm WR (Water Repellent) Protector Filter is a simple, clear filter with a 1x filter factor and is designed to provide general protection for your lens. This optically clear filter does not affect overall image quality while helping to prevent dust, scratches, moisture, and other elements from reaching or damaging your lens. This filter is multi-coated to eliminate internal ghosting and reflections. An anti-static coating serves to limit the accumulation of static electricity, making dust particles easier to remove or preventing them from adhering to the filter. Additionally, a water-repellent coating results in an improved beading effect when in contact with water, as well as oil, for greater cleaning efficiency while enhancing scratch resistance.

Sigma WR Protector filters are constructed from optical glass with a black rim. Set within an aluminum-alloy filter ring that is durable while remaining lightweight, the glass provides increased clarity as well as color fidelity while the black rim further ensures that reflections do not occur along the filter's edge.

Clear Protection Filter    Prevents Damage to Lens    1x Filter Factor, +0 Stop    No Effect on Image    Black Rimmed, Optical Glass Construction    Multi-Coated    Water, Oil, Static, Scratch Resistant    Slim Aluminum-Alloy Filter Ring    82mm Front Filter Threads    Knurled Front Edge, Plastic Case

Clear filter offers general protection for your lens against the elements.

Does not require adjustments to exposure while in use.

Multi-coated to help eliminate internal ghosting and reflections.

Anti-static coating serves to limit the accumulation of static electricity, making dust particles easier to remove or preventing them from adhering to the filter.

Water repellent coating results in an improved beading effect when in contact with water, as well as oil, for greater cleaning efficiency while enhancing scratch resistance.

Creates no additional coloration or contrast.

Constructed from clear, optical glass with a black rim which further ensures that reflections do not occur along the filter's edge.

Slim, aluminum-alloy filter ring helps to prevent vignetting and is durable while remaining lightweight.

Knurled front edges provide a more textured grip when mounting or removing it from a lens.

82mm front filter threads allow for use with other filters.

Plastic case included for storage and transport.

Related Questions and Answers

Q: 1. what is wr stand for?

A: Water resistant

Q: 2. How thick is the glass on these filters? (Not concerned about the total height of the assembly)

A: Same as other filters.

Q: 3. Is the front threaded? For protective Cap Storage?

A: Yes, it has a 95mm front thread.

Q: 4. Is this the filter for the front of the lens? If so, it must be larger than the "46mm" shown in the title. What size is it?

A: The following filter is a 46mm that is designed and made for the Sigma 500mm f/4 DG OS HSM Sports Lens's filter holder only.

Q: 5. Will this work with a Lee Foundation Holder or a Cokin Z-Pro holder?

A: Unfortunately no, this filter will not work. Those filter systems require square or rectangular filters.

Q: 6. What is the light transmission of this?

A: Sigma does not have any published specifications for light transmission of this CPL (which I believe is typical because most CPLs have filter factors in a range) but does advertise a 30% increased transmission over their competitors' CPLs. This filter does have a 0.3-0.5 stop reduction of light, which equates to a theoretical numerical transmission of 81.2% (at 0.3 stops) to 70.7% (at 0.5 stops), the formula being 100% multiplied by half to the power of 0.3 and 0.5.

Q: 7. why am I having problems with scratches on the glasswhy am i getting scratches on the glass?

A: A filter like a lens is still glass and is sensitive to scratches like any other lens.Some filters are better than others. But a lens cap still needs to be used when using filter to protect it when you put it in a camera bag.

Q: 8. Hello, does it fit to the Nikon AF-S 24-70 f/2.8E ED VR?

A: Yes, the Sigma 82mm WR Ceramic Protector Filter can fit the Nikon AF-S NIKKOR 24-70mm f/2.8E ED VR Lens.

Q: 9. Real-life experience comparison regarding the 'water repellant' coating of this filter vs., say, the B + W circular pola? Any difference in environments with rain/snow/humidity? Thanks.

A: Yes, the water repellent works quite well when it comes cleaning the filter without leaving streaks,etc...,as well as not fogging up.

Q: 10. Which metal is used for the new Sigma filters?

A: The filter is very new and some information is not out yet. As of now it seems the frame is brass like the other models.