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Polarizing filters test

10 August 2009
Szymon Starczewski

25. Marumi MC C-P.L 72 mm

Polarizing filters test - Marumi MC C-P.L 72 mm
Polarizing filters test - Marumi MC C-P.L 72 mm
Marumi MC C-P.L 72 mm
Price: 169 PLN


Marumi products are valued by photographers on account of good price/quality ratio. Filters with DHG symbol are equipped with improved antireflection coatings and the glass edges are blackened to avoid internal reflections.

Results of the test

Transmission and extinction coefficient
Polarizing filters test - Marumi MC C-P.L 72 mm

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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Red color extinction coefficient: 3.73E-4 - Score: 3.5/4
Green color extinction coefficient: 3.47E-4 - Score: 3.5/4
Blue color extinction coefficient: 1.68E-2 - Score: 0.5/4
Mean transmission of the whole spectrum: 33.89% - Score: 1.78/3
Score:
9.28/15
Flares
Without filter
Polarizing filters test - Marumi MC C-P.L 72 mm

With filter
Polarizing filters test - Marumi MC C-P.L 72 mm

Score:
6.75/7.5
Scattering
Polarizing filters test - Marumi MC C-P.L 72 mm

Luminance: 91.4
Score:
2.17/5
Vignetting
Edge darkening: 2.9%
Score:
3.94/5
Homogeneity
Polarizing filters test - Marumi MC C-P.L 72 mm

Slight flaw in homogeneity
Score:
4.5/5
Final score
Overall ranking: 8th place
Econo-ranking: 6th place
26.6/37.5 pts (70.9 %)
0.66 pts

Usage

The filter didn’t create any problems during the tests. It’s easily cleaned. The ring turns smoothly, a slight swoosh of friction is audible.

Summary

8th place in the overall ranking (26.6/37.5)
The transmission curve is flat in the visible spectrum, only violet color is transmitted a little worse. It’s not extinguished entirely as well, however it’s not an important effect. The polarizer becomes transparent in infrared. The extinction coefficient of about 3.5/10000 is a good result for a foil polarizer. C1 and C2 graphs indicate that we’re dealing with a quarter-wave plate of zeroth order designed for the middle of visible spectrum. The biggest downside of this filter is large light scattering. Applying multilayered antireflection coatings did handle well with unwanted flares, but large scattering triggered the appearance of halo effect in night pictures. It’s the cheapest of Marumi filters, the producer must have economized on something.

Filter for tests was lent by Pstryk.pl