The product is of high quality and has very precise specifications. Not easy to scratch and dust holding bad it will definitely consider a small very soft chamois to clean it regularly.
Apart from that, I tested for a whole day and two different boxes (cannon) views taken without filters near a river and therefore with a lot of reflections and mountains. I then repeated the same photos with filters.
I was in speed priority mode and priority mode to the opening of the landscape picture in cold weather and therefore without atmofpheric sailing either in Mézenc or the Loire Haute-Loire.
Primo: The filters do not affect the colors whether ND2, ND4 and DN8
Secondo: I got more details on my pictures with these filters. We can see the chain of the Alps and the images are crystal clear. Rocks and reflections are apparent and herbs and water movements.
I then paired these filters with another polarizing filter but HOYA this time. Same quality images with very pure and slamming colors.
While these filters are far from being the most expensive are very good quality and even allow a very good amateur photographer (if my colleague) to obtain accurate results.
