Over the last few years I've ordered a number of filters, from several of the different K&F series filter lines, and with only a VERY few instances, I've been happy with all of them. This "K&F Concept 72mm Circular Polarizer Lens Filter [CPL]" is another plus product from them.

I ordered this 72mm filter as an experiment to see how it would work matched with my Sigma 15mm f/1.28 EX DG fisheye lens. But because this lens incorporates a large bubble for the front element I wanted to try screwing it into the extended lens cap and the experiment was then whether the CPL would still work. Having screwed it into the extended cap the filter rotated smoothly. Photographically, however, although the CPL filter did a good job with both sky color and water reflections the barrel efect of the lens as increased by the extended cap's distance from the lens element made the pictures not worth reprinting here. Despite that result, I will be keeping, rather than returning, the lens for use with 72mm camera lenses that I will no doubt be buying in the future.

All in all I think that this "K&F Concept 72mm Circular Polarizer Lens Filter" is a good buy given its mid-range cost and better than average performance. I think it is a solid 4 star product which should be considered by anyone in the market for such a CPL filter.

(Please see below for my rating criteria):

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Disclosure:

As noted by Amazon, I am part of the Vine Program which means that I acquire products at no cost in return for a truthful rating. However, although Vine Members pay nothing up front to get these free products they are considered by the Internal Revenue Service as taxable income at the full retail price at the time we get them and we, therefore, must pay taxes on these items.

On a more personal note I often read reviews for products I am considering buying and rely on those reviews that are detailed and come off as honest and full reviews on the product. I therefore try my best to give a true and honest review based on my own experiences with the product.

My Rating Scale:

1 star. This is the absolute lowest I can go and is a definite recommendation against being purchased.
2 stars. Less than average - having issues that I try to delineate in my review. I personally would not pay for this item.
3 stars. Average - neither great nor terrible. It will do the job it is supposed to do but without any obvious good or bad issues.I might or might not buy this item depending on the severity of my need or want.
4 stars. While the product is better than average it is not an excellent product. I would probably buy this product.
5 stars. Enough above average that it exceeds my expectations of how the product would and should perform. A product getting this rating is highly recommended.

Further middle ratings: The above explanation is the base of the recommendations I give in a review. Some ratings are further rated as soft (1/2 star below), solid (the star rating given) or strong (1/2 star above)