Filters can help produce better photos. However, the quality differences between filters are huge. If you have a great lens, you do not want to risk image quality loss due to inferior filters. Rodenstock guarantees the best possible filter quality. The optical glass used must be homogeneous and “plan parallel”. The surfaces must be smooth. The polish must be equal to that of the surfaces of camera lens elements so as not to cause any scattered light. The filter frame may not project too far beyond the front edge of the lens barrel so that the filter does not cause vignetting with wide-angle shots. Rodenstock filters have a very flat slim line frame. This allows room for a front thread. Black anodized aluminum rings are strong and light-weight. The glass edges of all Rodenstock filters are blackened so that no contrast-reducing reflections are caused there. When light is incident on a surface, it is partly reflected. A circular polarizer reduces these reflections. Reflections can be reduced or eliminated at an ideal angle of incidence of around 55 degrees. Reflections can also be amplified up to twice their brightness for more intensive sun reflections on water. The blue light of the sky reflected, e.g. from red roofs, green grass and foliage, is polarized. Landscape shots taken with a polarization filter allow the blue tinge to be reduced producing better color saturation. Blue light from the sky can be intensified using a polarization filter rotated into a suitable. The circular polarization filter requires 1.5 f-stops as a correction.HR Digital Pro Circular Polarizers with Multi-coatings have: The best optical glass and perfect optical surface quality Multi-coatings with a high light transmission rate An extremely scratch resistant coating and liquid and dirt-repellent coated A rugged slim aluminum ring with front thread
  • Uses high-performance polarizing film free of veiling and with a neutral color effect to ensure no loss of image definition as well as unaltered colors and the lowest possible light loss
  • The polarizing film and the l/4 layer are cemented between absolutely plan parallel glass plates to avoid reflections at the glass/air interface as well as further light losses and scattered light.
  • Both outer surfaces are incredibly smooth and multi-coated to increase light transmission and loss of contrast
  • The black anodized aluminum slim line rotatable mount is so unobtrusive that it does not cause any vignetting even in shots with most wide-angle lenses
  • Mount has front thread for a lens hood and a lens cap.

Rodenstock 506740 67mm Circular Polarizer Slim Aluminum Mount Multi-coated Re...

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