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Polarizing filters test

10 August 2009
Szymon Starczewski

11. Fujiyama Digital CPL 72 mm

Polarizing filters test - Fujiyama Digital CPL 72 mm
Polarizing filters test - Fujiyama Digital CPL 72 mm
Fujiyama Digital CPL 72 mm
Price: 171 PLN


Fujiyama is a brand belonging to Marumi. Products of this company 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 - Fujiyama Digital CPL 72 mm

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Red color extinction coefficient: 4.22E-4 - Score: 3.5/4
Green color extinction coefficient: 5.17E-4 - Score: 3/4
Blue color extinction coefficient: 1.73E-2 - Score: 0.5/4
Mean transmission of the whole spectrum: 34.72% - Score: 1.94/3
Score:
8.94/15
Flares
Without filter
Polarizing filters test - Fujiyama Digital CPL 72 mm

With filter
Polarizing filters test - Fujiyama Digital CPL 72 mm

Score:
3/7.5
Scattering
Polarizing filters test - Fujiyama Digital CPL 72 mm

Luminance: 18.3
Score:
4.88/5
Vignetting
Edge darkening: 6%
Score:
2.22/5
Homogeneity
Polarizing filters test - Fujiyama Digital CPL 72 mm

Without reservation
Score:
5/5
Final score
Overall ranking: 14th place
Econo-ranking: 18th place
24/37.5 pts (64 %)
-1.99 pts

Usage

The ring turns smoothly with delicate friction sound, cleaning wasn’t troublesome. Its width makes it easy to operate but affects vignetting.

Summary

14th place in the overall ranking (24/37.5)
The transmission curve is a little uneven. There are local minima around 600 nm (orange color), but they don’t exceed 10%. The coefficient of extinction of around 0.5/1000 is good for a foil polarizer. Violet color is not extinguished entirely, but it’s also the affliction of other filters. 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 polarizer has good optical characteristics, but antireflection coatings are missing and the wide ring doesn’t work that well on a wide-angle lens.

Filter for tests was lent by Fotozakupy.pl