Sigma 95mm WR (Water Repellent) Protector Filter

Very well built... Solid.. Always stays clear. I have accidentally touched the front of this filter but nothing was left on the filter. Must have a coating on it that repels water, fingerprints, etc. It is absolutely clear with no color affect.

The threads are smooth and the filter screwed on without any binding or grinding. The optical quality is good and I don't see much difference (if any at all) in image quality when using the filter.

Good quality UV protector filter for the price. Comes in handy to protect an expensive lens when pushing the camera through plant life while taking photos.

come with the lens, need it to protect the lens, no obvious image quality downgrade

It fit my Tamron 150-600mm lens perfectly. Did not change any color values or make itself obvious in any other way.

This Sigma filter is great for the Canon RF 800mm. There's no image distortion from it or any aberrations that might occur on image capture with this filter attached. Thank you Castle Cameras for supplying this and shipping quickly.

Does what it says. Fits fine.

Wanted protection for my lens and this USA quality filter,

This protector is essential for wildlife photographers who are out in the field and run the risk of damage to the lens.

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  Clear Optics, Easy To Use, Firm Mount, Strong Construction

As far as lens filters go, it seems to be durably built, and does not appear to have any negative impact on the image quality, and I am glad it came as a free accessory, since a 95mm filter is not cheap to buy.