B+W 1057396 Fiche technique télécharger pdf (Page 5)

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Behind the globally recognized B+W lter quality is a continuous process

of optimization and quality control which already begins with the raw glass

blocks. For the production of the high-precision B+W lters Schott colored

glass is used almost exclusively because Schott guarantees the very highest

glass quality.

In Bad Kreuznach, computer-controlled grinding and polishing machines

produce the highest lter quality from this raw material in an impressive

range of designs and diameters. Special production processes remain the

domain of the optimizing handcraft of experienced specialists. Strict quality

checks in all key production steps ensure seamless production standards.

B+W quality does not come about by coincidence, but is clearly dened: to

manufacture exactly plane-parallel lter discs without arching or wedge

errors (deviating thickness) which could lead to partial image blurring.

The lter glass must be completely smooth, because roughness results in

scattered light and an unwanted soft focus effect. B+W lter glass meets

the highest requirements of camera and lens manufacturers and guaran-

tees optimum imaging quality.

B+W is the rst lter manufacturer in the world to offer MRC (Multi Resist-

ant Coating). This multi-layer coating is vapor-deposited in highly advanced

vacuum coating plants. It is extremely low-reective and highly resistant to

scratching. But above all its unique dirt and water-repellent surface makes

cleaning the lters easier. In this way, lters can also perform a protective

function for the front lens.

The continuous new development and further development of the B+W lter

models and the nal inspection of each individual lter mean that users can

achieve the best possible photographic results. It is therefore important to

give the same consideration to quality when buying a lter as when select-

ing your lenses. 60 years of know-how guarantee top lter quality to meet

global market standards. A brand promise we can be very proud of in Bad

Kreuznach.

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CNC-controlled diamond grinders rounds rectangular glass to

form lter discs

Filter assembly is performed carefully

using torque-controlled equipment

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B+W 1057396 Fiche technique Page 5