The 46mm Circular Polarizing Lens Filter (Plus+) from Urth cuts polarized light to increase contrast and boost color saturation and vibrancy by filtering out reflections from water, sky, glass, and non-metallic surfaces. A polarizing filter is an essential tool for landscape photography, as it saturates a blue sky to make clouds pop and reveals details under the surface of water obscured by glare.

Urth Plus+ filters feature 20 layers of nano-coating to provide easier cleaning and better protection against water, oil, and scratches. The nano-coating layers also provide a higher maximum light transmission and a more consistent transmission curve for sharper images and finer color transmission. This filter is made with Shott B270 optical glass mounted in an ultra-slim, rotating magnalium alloy filter ring. The slim design prevents vignetting when used with wide-angle lenses, while maintaining lightweight durability.

Circular Polarizing Filter    2.4x Filter Factor, +1.3 Stops    Helps to Eliminate Reflections and Glare    Reduces Haze in Landscapes    Schott B270 Optical Glass    20-Layer Nano-Coating    Rotating Magnalium Filter Ring    46mm Front Filter Threads    With Microfiber Lens Cloth and Tin Case    Limited Lifetime Warranty

• CPL Filter Plus+ cuts up to 99.9% of polarized light for increased contrast and color saturation
• 20-layer nano-coated German Schott optical glass
• Cuts polarized light's reflection from water, glass, and non-metallic surfaces
• This Urth filter funds local communities to plant five trees in areas affected by deforestation

Related Questions and Answers

Q: 1. Is this lens compatible with a Nikon D3300 DSLR Camera?

A: The Sigma 8mm f/3.5 Fisheye for Nikon will be compatible with the Nikon D3300, though autofocus will not be supported. You would need to manually focus the lens.

Q: 2. Will this product work properly on my Canon 7D Mk I. Also, will it work in a 5D Mk IV?

A: No, this lens is designed to fit and work only on the Canon cropped sensor mirrorless cameras. Like the M6, M6, M50 and M100

Q: 3. will this work with a sony alpha 7 III?

A: Yes, this lens will work with the A73, however, it is a cropped sensor lens and will reduce the resolution on your camera by about 40%.

Q: 4. do i need an adapter? because it fits but my camera doesn’t recognize it

A: It is a manual only lens. It will not communicate with the camera. On some cameras you have to set them to shoot with out a lens before they will fire.

Q: 5. What is the diameter of the image circle on this lens?

A: At the edges, which are slightly softened, the diameter would be about 21-22mm. The lens creates a black-bordered image on a FF sensor which is about 24mm high.

Q: 6. Possible to get a short video clip to see the effect of the 190deg please?

A: Here are three video reviews. https://bit.ly/2DMJTku https://bit.ly/2sX14JV https://bit.ly/2sXmQx1 Here are posted still images https://bit.ly/2DKY2OZ

Q: 7. If I mount this onto a full frame film camera (leica M6) with an adapter - will the image still be circular? Or will it be distorted/warped?

A: Although there are no adapters to mount this EF-M lens to a Leica M6, it would produce a circular image.

Q: 8. Has anyone used this lens with a SpeedBooster adapter on a Sony APS-C body? I'm wondering if you get the full circular fisheye effect. Since I'm going to move to Sony full-frame eventually, I'd rather buy this than the 4.5mm crop sensor lens.

A: I doubt anyone has done this specific combo before. Though you will get no ill effects from doing so. You will still get a circular fisheye effect from this lens.

Q: 9. Will this Sigma 8mm lens with an FTZ adaptor work on a Nikon Z8 in manual focus mode?

A: The Sigma 8mm lens will work with a Nikon Z8 and the FTZ adapter.

Q: 10. Wanting to make 360 photos. Would this be a good lens for that?

A: It offers a circular photo in a full frame camera so not the best option for 360 images that you will be stitching in the computer. The reason is that part of the sides of the image will be black so it won't be good when stitching the photos together.