B_W-Filter-Square-Glass-806-header.png

B+W FILTERS

Square Filters

Square Filters 800

High-quality finely ground and polished special glass forms the basis of the ND square filters. This guarantees the necessary optical quality and ensures that a high-quality lens is not compromised.

The ND filter effect is created by coating the glass surface. Uniformity is important because only then is light evenly attenuated over the entire visible area, resulting in optimum color-neutral images. Using this manufacturing technology, a combination of coatings ensures the highest quality filter lenses and, in addition to the filter effect, reduces unwanted reflections via an anti-reflex system (7 layers per filter side).

Finally, a water-and-dirt-repellent nano-coating is applied. This scratch-resistant coating protects the whole of the square filter. It also facilitates easy cleaning and maintenance of the filter. 

photo-optics-bw-square-filter-800-black.png

Information

The effect of two ND filters results from the sum of the density values. For example, the B+W ND filters 802 (ND 0.6; +2 f-stops) and 803 (ND 0.9; +3 f-stops) combined creates a density of ND 1.5 and thus comply with the effect of +5 f-stops.

Tip

  • Flow effects can be created with a shutter speed of
    ¼ second and above.

  • The longer the exposure time, the stronger the effect (ND 806/810/815)

  • Experiment with different exposure times

  • Use the manual exposure setting

  • Use low ISO sensitivities and small aperture values

  • A stable tripod is essential

photo-optics-bw-square-filter-800-grey.png

Examples

square-filter-800-before.png

Without filter

square-filter-800-after.png

With B+W filter 802

square-filter-815-before.png

Without filter

square-filter-815-after.png

With B+W 815 filter

Square 800 Availability

photo-optics-bw-802-square.png

802 ND 0.6

  • Coating: MRC Nano

  • 100 x 100 x 2mm

photo-optics-bw-803-square.png

803 ND 0.9

  • Coating: MRC Nano

  • 100 x 100 x 2mm

photo-optics-bw-806-square.png

806 ND 1.8

  • Coating: MRC Nano

  • 100 x 100 x 2mm

photo-optics-bw-810-square.png

810 ND 3.0

  • Coating: MRC Nano

  • 100 x 100 x 2mm

Transmission Curves

square.tiff

TECHNICAL SPECIFICATIONS

The innovative ND coating technology delivers considerably higher color fidelity when compared to melted ND filters. The coating material can almost completely balance the physically induced excess of the red component. Thanks to the optimized color reproduction across the visible light spectrum, subsequent image processing are made easier and less time consuming for the photographer.

squaretech.tiff