B+W ND-Filter (Neutral density filter) 803 67 mm Master MRC Nano. Type 803 reduces the light by exactly three f-stops, filter factor 8x. By increasing your aperture or slowing your exposure time, you can control depth of field and convey movement more easily. Neutral density filters do not affect the coloration of the image and are ideal for pairing with other filters.
ND filters can produce wipe effects in movements if the exposure time can be extended with the required aperture. A waterfall then no longer appears to be frozen, but as a flowing motion. ND filters create ingenious effects in architecture or urban photography. With long exposure times of several hours, people walking through the shot are blurred or not reproduced at all. For physical reasons, very dense filters possess a warm tone which can be compensated in image processing.
The excellent, finely ground and polished special glass is used as the basis for the new ND filter glasses. This guarantees the necessary optical quality, and also does not have any adverse effect on a correspondingly high-quality lens. In the thin-film technology that has been developed here, it is not just the pure ND filter effect that delivers results: a 3-layer combination coating also optimises the ND filter.
MRC Nano Coating
An important criteria for a perfect B+W filter is a high-quality coating, also known as an antireflection coating. With a B+W filter, such layers are evaporated by means of thin-layer technique, a quite complex coating process. The coating material consists of special substrates that are applied in one or more layers depending on the coating system.. In the MRC nano coated B+W filter, a water droplet remains practically spherical. It rolls over the surface. A first-rate dirt and water-repellent effect occurs.
Master Filter Holder
Durable and robust due to brass mount with better grip due to optimized knurl. Easier mounting due to new lacquer technology. Best choice for super wide angle – telephoto lenses.
In addition to the filter effect, the combination coating also prevents trouble-some reflections by including a multilayer anti-reflection compo-nent with seven layers on each side of the filter. Finally, an outer layer with the usual dirt- and water-repellent properties is applied. With this feature, the filter not only has all-round protection, but simple cleaning and care of the filter disk are also taken care of. The light attenuation itself is very uniform over the entire visible range and therefore produces optimal, colour-neutral images.
Exposure change with ND filter
Table showing aperture and shutter speed when using ND filter
| Stop > |
8 |
11 |
16 |
22 |
32 |
| Time > |
1/500 |
1/250 |
1/25 |
1/60 |
1/30 |
| ND 0.3 |
1/250 |
1/125 |
1/60 |
1/30 |
1/15 |
| ND 0.6 |
1/125 |
1/60 |
1/30 |
1/15 |
1/8 |
| ND 1.8 |
1/8 |
1/4 |
0.5 sec. |
1 sec. |
2 sec. |
| ND 3.0 |
2 sec. |
4 sec. |
8 sec. |
15 sec. |
30 sec. |
Filter factor
The denstity of an ND filter can be described with different units.
| Type |
|
Optical Density |
F-Stops |
Filter Factor |
LV |
% |
| 102 |
802 |
ND 0.6 |
+2 |
4 x |
-2 |
25 |
| 103 |
803 |
ND 0.9 |
+3 |
8 x |
-3 |
12.5 |
| 106 |
806 |
ND 1.8 |
+6 |
64 x |
-6 |
1.6 |
| 110 |
810 |
ND 3.0 |
10 |
1,000 x |
-10 |
0.1 |
Foundation of the company “Optische Anstalt Jos. Schneider & Co.” The company, founded 1913 by Joseph Schneider, trades today under the name of Jos. Schneider Optische Werke GmbH. It manufactures for the world market high-performance lenses, photographic and industrial filters as well as professional accessories. Further product ranges are electro-hydraulic and electro-pneumatic servo valves for the machine constuction and industrial processing engineering as well as single and multiple focus lenses and graduated lenses for the ophthalmic optics. The company’s B+W brand for photo filters are established worldwide as premium products.