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Polarizing filters test 2015

1 November 2015
Szymon Starczewski

5. B+W KSM HTC-POL MRC XSP

Polarizing filters test 2015 - B+W KSM HTC-POL MRC XSP

Another company with tradition and reputation which has to be defended. In our first test of filters high prices of their products were usually followed by good results but there was one slip-up too. Today we are taking a closer look at 4 filters you can find the current line-up of B+W.


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Results of the test:

Transmission and extinction coefficient

Polarizing filters test 2015 - B+W KSM HTC-POL MRC XSP

  • Red color extinction coefficient: 2.03e-2; Score: 0.5/4
  • Green color extinction coefficient: 3.95e-4; Score: 3.5/4
  • Blue color extinction coefficient: 5.50e-3; Score: 1/4
  • Mean transmission of the whole spectrum: 44.52% Score: 3/3
    Score: 8 / 11 pts
Flares

Polarizing filters test 2015 - B+W KSM HTC-POL MRC XSP
Without filter

Polarizing filters test 2015 - B+W KSM HTC-POL MRC XSP
With filter

Score: 7.125 / 7.5 pts

Scattering

Polarizing filters test 2015 - B+W KSM HTC-POL MRC XSP

  • Luminance: 6.81
    Score: 5 / 5 pts
Vignetting
  • Vignetting difference: 3.15%
    Score: 3.81 / 5 pts
Homogeneity

Polarizing filters test 2015 - B+W KSM HTC-POL MRC XSP

  • Without reservation
    Score: 5 / 5 pts

Final score: 28.9 / 37.5 pts (77.2%)

  • Overall ranking: 4th place
  • Econo-ranking: 17th place

Design, usage and summary

The only B+W model with a slim ring; its surface is covered by broadband coatings easy to clean. The filter moves with even, moderate resistance and most likely it is glued. You can hear slight whirr during the turning and there are practically no slacks.

The transmission characteristic is the same as in the case of the B+W KSM HTC-POL MRC model.