very good quality ... 84

... You can not complain.
Get exceptionally favorable moment in the 62-size, so I decided to swap my skylight filter UV filter, no more than necessary to load the automatic white balance of the camera.
Anyway, mechanically sound, very meticulously crafted and painted black, the lettering is something inappropriate in bronze - have mentioned just to make it. Made in Japan.
Visually no Unauffälligkeiten. With my old MF lenses (I bought 4 of these filters), attached to a digital Nikon Df, I can nix notice negative, except for the lens error (backlit reflections) that I know when the lenses for decades.
Also the lens cap (Nikon old) fits neatly onto the front thread. The filter is normally thin, so no ultra-slim variant.
Relatively easy to clean, which I know him better, however.
Comes in a normal filter protective packaging.
So - if cheap and good, it must also be a Sigma filter with me - to protect the front lens.
Greeting, Rounder6