I have used filters for the SLR lens in the past for two demanding ones: high-altitude photos in summer with explosive sun and photos of water flowing in streams to create the “scrolling” effect.

However, both lenses and filters were cheap, but now I have switched to a 100mm macro lens with a very high cost, so even the filters must be of quality to support the lens itself.

This K&F filter struck me because it integrates into a single product, what I previously obtained with two separate filters, and since as simple as it is, changing filters when changing subjects is always inconvenient.

The product comes super protected in its leather packaging, already a sign of the importance placed by the manufacturer in preventing it from being damaged when stored with other photographic equipment.

The construction quality is immediately noticeable in comparison with the previous filters: we are on another planet!
In addition, the filter has two handles to be able to adjust the two internal rings, which are very convenient because it avoids adjusting the wrong one if it were necessary to do it using the edge.

Let's say right away that for the test, due to rainy weather, I couldn't extend it properly, due to very dilute natural light.

However, I chose to photograph live sphagnum, because it has an intense green color that often escapes the normal lens, looking for the patch of sky where the brightness was highest.

As can be seen from the photo, on the left is the unfiltered sphagnum with the 1:1 macro lens and on the right the same shot with the filter inserted (obviously used at maximum brightness in this case).

The colors are now much better.

5-star rating: except for any future updates when there is a time that will allow a better outdoor test, I am currently fully satisfied with the filter, whose price is adequate for a goal that costs 10 times more.