Ever since I started reviewing the K&F filters I have become a major fan of the company. The quality of the filters and the construction are excellent. The glass has been of extraordinary optical clarity and the brass rings are precisely machined. I’ve never had any problems with cross threading or stripping. The filters go on very smoothly and come off just as smoothly.

They are very of all filters have just enough friction to stay where you put them but turn buttery smooth on the camera so you won’t have to worry about moving your camera on the tripod. they are just a really pleasure to use. This per tick Euler filter has appropriate markings around the rim to let you know which stop you’re setting is at and it has a little tab to make turning the filter easier. It’s a very low profile and should not cause any interference with your image I.e. no vignetting.

Back in the old days a problem with variable neutral density filters was you would get this artifact of the two polarized plates crisscrossing and you would get these optical “X” artifacts in your image. I believe the newer ones used a spiral circular polarization and this allows you to have an artifact free image.

This filter does exactly what it supposed to do which is to darken your image to allow for longer exposures or just cut out extreme light and glare on a very bright day.

One thing I notice about this filter is that his measurements are extremely accurate. If you said it for four stops and then take it off and lower your camera for stops down, the lighting is going to appear identical although there will be a little more glare without the filter because the polarization also cuts the glare.

Another optically perfect excellent filter from K&F.