Product Description
Circular polarizing filters are made for all cameras with beam splitters in
the light paths of their TTL exposure meter and with autofocus lenses. Circular
polarization has the same pictorial effect as linear polarization, but allows
for proper exposure metering and/or autofocus distance settings.
The high-end polarizing foils of the Ksemann-type filters are neutral in
color, they have a higher efficiency than conventional polarizing foils and they
are cemented between high-grade plano-parallel optical glass.
The resulting sandwich is then precision-polished again to achieve highly
accurate plano-parallel surfaces. Subsequently they are edge-sealed to protect
the foil against humidity. Brass mounts made on CNC-controlled machines ensure
precise seating on the lens. Discriminating photographers regard the B+W
Ksemann-Type Polarizing Filter to be the very best of all polarizing filters.
They are well suited for applications that require the highest possible imaging
quality, especially with high-speed telephoto lenses and apochromatic lenses.
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