A neutral density filter permits you to capture images such as the rushing movement of a babbling brook or the swirling chaos of city traffic. Without the filter, your final image would simply be a static shot of water frozen in a moment's time. Since wider apertures are possible, your depth of field will also be minimized. This gives you an edge when shooting portraits since you will be able to achieve more separation between your foreground and background. An ND filter permits you to shoot your image under bright light conditions at the same aperture but at a slower shutter speed.
Heliopan Lichtfilter-Technik of Munich, Germany, has changed their black anodized brass filter rings on most Heliopan non-rotating filters to their improved "slim" mount. This slim mount is made of black anodized brass stock and has so little rim in front of the lens (5.4mm) that it will not vignette (darken the corners of the image) with lenses as short as 21mm.
The reputation of Schott glass is world renowned. The high production standards combined with a sturdy brass filter ring make filters made with Schott glass hard to beat. These filters have a "heft" to them that is impressive. They may feel heavier but the benefit is in the construction and results. Not only is the glass exceptional but so is the seal between the ring and glass. Schott glass used in the manufacture of this filter is legendary and synonymous with the highest standards of filter production.
Neutral Density Filters Have Four Main Uses
|Filter Type||Neutral Density|