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Polarizing filters test 2015

1 November 2015
Szymon Starczewski

9. Benro UD CPL-HD

Polarizing filters test 2015 - Benro UD CPL-HD

That make is rather associated with tripod stands, bags and backpacks than with filters. Still they have gathered a lot of positive opinions although the company comes from China. Taking into account the high quality of their equipment you simply have to take a closer look at their filters - we chose 4 models from different segments for our test.


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Results of the test

Transmission and extinction coefficient

Polarizing filters test 2015 - Benro UD CPL-HD

  • Red color extinction coefficient: 2.75e-2; Score: 0.5/4
  • Green color extinction coefficient: 4.72e-4; Score: 3.5/4
  • Blue color extinction coefficient: 6.91e-3; Score: 1/4
  • Mean transmission of the whole spectrum: 39.56% Score: 2.91/3
    Score: 7.91 / 11 pts
Flares

Polarizing filters test 2015 - Benro UD CPL-HD
Without filter

Polarizing filters test 2015 - Benro UD CPL-HD
With filter

Score: 3 / 7.5 pts

Scattering

Polarizing filters test 2015 - Benro UD CPL-HD

  • Luminance: 75.67
    Score: 2.75 / 5 pts
Vignetting
  • Vignetting difference: 4.08%
    Score: 3.29 / 5 pts
Homogeneity

Polarizing filters test 2015 - Benro UD CPL-HD

  • Minimal streakiness
    Score: 4.75 / 5 pts

Final score: 21.7 / 37.5 pts (57.9%)

  • Overall ranking: 16th place
  • Econo-ranking: 19th place

Design, usage and summary

The filter comes with a screw-on ring – it is a big asset and hardly the cheapest solution as well. The resistance of the movement is even but it could have been a bit less tight. You can feel slight slack and there is a bit of whirr during the work. The filter came from the factory dirty, most probably smeared with grease, and despite the lack of coatings it was difficult to clean. Apart from that there is nothing to complain about.

The spectrum characteristics are flat with a slight decrease in the blue part – it is very similar to the Marumi Exus filter without coatings. In fact you could quote here the whole commentary concerning the transmission curves. Unfortunately the lack of layers is keenly felt here so the homogeneity and dispersion are a bit worse. Facing a very strong competition the Benro UD has to be placed at the bottom of the group.