The Sigma 52mm WR Protector Filter for Camerasis 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    52mm 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.

52mm front filter threads allow for use with other filters.

Plastic case included for storage and transport.

Related Questions and Answers

Q: 1. Is the filter frame aluminum or brass?

A: The ring on this filter is aluminum.

Q: 2. I'm having difficulty opening the case for the first time in which the Sigma 95 mm WR Filter is packed. I've tried twisting it and cannot find any plastic sealant. I would appreciate direction. Suggestions?

A: For the case of the Sigma 95mm WR Ceramic Protector Filter one can turn the top part of the case counter clockwise and then simply pull it off.

Q: 3. Any vignetting when mounted on a Zeiss 15mm lenses on Nikon D810?

A: This filter may cause vignette when mounted on a full frame camera and 15mm lens.

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. Is the front threaded? For protective Cap Storage?

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

Q: 6. If you place the 82mm filter on the RF 85mm 1.2L, can you still attach the lens hood?

A: The Canon RF 85mm f/1.2 L USM Lens has not been tested with that specific filter but it does work with most with the hood attached. The hood will not work with most polarizing filters.

Q: 7. How effective is the hydrophobic treatment? Presumably a titanium oxide coating?

A: Hydrophobic and oleophobic coatings on glass elements and filters such as the Sigma 95mm WR Ceramic Protector Filter (B&H# SICGC95) are typically fluorine-based rather than titanium-based, as the later would block much visible light. It causes most water to bead and roll off if there is any incline to the angle at which the filter is held. When dealing with water droplets and splashes, I have found this type of coating sheds most water without my needing to address it at all. When a water droplet does not roll off right away, I just blow on it to shed it without having to take a break to wipe the lens or filter. I do not need to touch the element at all and I'm immediately back to shooting.

Q: 8. what is the difference between sigma WR protector clear glass filter 95mm vs Sigma WR Ceramic protector filter 95mm ?

A: The WR Ceramic Protector Filter would use a clear glass ceramic substrate which has added strength and a higher transmittance value over the WR Protector Filter which uses a glass element that is not as strong.

Q: 9. Will this vignette with an 18mm lens? Specifically the Tamron 18-300 (67mm). Any issues with the hood fitting properly?

A: This filter will not vignette unless it's wider than 16mm on a full frame camera. You shouldn't have any issues fitting the lens hood over the filter either.

Q: 10. Does lens also have anti-reflective coatings and how many?

A: Unfortunately no, it is not multicoated. This version is the coated version by Sigma: https://bhpho.to/2YVgoZm