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Polarizing filters test 2015

1 November 2015
Szymon Starczewski

19. Marumi FIT+SLIM Circular PL

Polarizing filters test 2015 - Marumi FIT+SLIM Circular PL

In our first test of polarizers the Marumi products fared exceedingly well, especially if you take into account their moderate price. Let’s see whether that result can be defended now by a new bunch of filters.



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Results of the test

Transmission and extinction coefficient

Polarizing filters test 2015 - Marumi FIT+SLIM Circular PL

  • Red color extinction coefficient: 5.25e-4; Score: 3/4
  • Green color extinction coefficient: 5.03e-4; Score: 3/4
  • Blue color extinction coefficient: 1.20e-2; Score: 0.5/4
  • Mean transmission of the whole spectrum: 31.14% Score: 1.23/3
    Score: 7.78 / 11 pts
Flares

Polarizing filters test 2015 - Marumi FIT+SLIM Circular PL
Without filter

Polarizing filters test 2015 - Marumi FIT+SLIM Circular PL
With filter

Score: 5.25 / 7.5 pts

Scattering

Polarizing filters test 2015 - Marumi FIT+SLIM Circular PL

  • Luminance: 11.80
    Score: 5 / 5 pts
Vignetting
  • Vignetting difference: 2.76%
    Score: 4.02 / 5 pts
Homogeneity

Polarizing filters test 2015 - Marumi FIT+SLIM Circular PL

  • Without reservation
    Score: 5 / 5 pts

Final score: 27.0 / 37.5 pts (72.0%)

  • Overall ranking: 7th place
  • Econo-ranking: 2nd place

For taking 2nd place in our econo ranking we decided to award this filter the following distinction:

Polarizing filters test 2015 - Marumi FIT+SLIM Circular PL

Design, usage and summary

The filter didn’t cause any troubles during the tests: good rings, moderate, even resistance of the movements, a slight whirr during the work. Noticeable axial slack but within reasonable limits. The filter is easy to clean like most of devices not covered by any coatings.

The transmission curve is a bit changeable but the deviations in the visible spectrum remain inside a 10% range. A good extinction coefficient on a level of 5/10000 right up to infrared. The violet is not damped down completely but that effect is not especially pronounced. A mean transmission of the whole spectrum and all polarizations amounts to about 31% and is the lowest in the test (the filter is also the darkest). The result would be much better if the producer decided to add some coatings and they would also eliminate artifacts.