Hoya lens filters are all-around awesome. Their build quality is solid, the anti-reflection layer performs well, and the price is significantly better than B+W and other brands.

Filter looks fine, however the Canon lens cap for the camcorder did not fit very well on the filter, so I will have to get another lens cap.

Most people into photography will instantly recognize the name K&F Concept as makers of high quality photographic equipment and these GoPro lens filters are no different. Quality multi coated optics are used in both the CPL and ND filters.With this lens set you get three ND filters (ND stands for Neutral Density - more on this in a minute) and one circular polarize filter.The CPL filter is a circular polarize lens filter. These are used for reducing glare in your videos and photos. It also helps brings out the deep blue in skies when shooting the sky, clouds, etc.You can rotate the front of the CPL lens which is a great feature as it allows you to see what effect it's having on your color in real time as you turn it.The ND, or neutral density filters act basically as 'sunglasses' for your camera's lens and sensor. They come in 8, 16 and 32 stops reduction which gives you plenty of variety and choice.One fairly typical use of a ND filter would be for taking a photo of a waterfall. You want that classic picture of a static landscape BUT with the water showing movement and flow.In order to achieve this, you'd have to deliberately overexpose the shot in order to give the water motion however in doing this, everything else in the picture (besides the waterfall) will be blown out and overexposed to the point of almost total whiteness!Now, if you place a ND filter on the lens, you're forcing the shutter to stay open longer resulting in a perfectly exposed picture with the flowing water in the waterfall.This is a great lens kit to have in your GoPro gear bag.

Can't believe I got this for.99 cent!! It works perfectly and I love interacting with my Alexa!

Awesome. Works well for very sunny days and on photos where have a lot of reflection from glass or water.

I have been using this filter to protect my lens and it has done the job.

Have had my previous ones for.10 years so was afraid to.purchase. these are better than the first

Nicely working with my lens. Picture quality may vary with different lenses because of lens quality. Filter is good in section. It justify it's price.Some samples here (*more reflection= without filter & *less reflection=with filter)