Cokin Pure Harmonie 55mm Variable Density Neutral Gray (ND X) Filter
PURE Harmonie filters are the thinnest and the lightest in the world. With a thickness of 3.3mm for the Multi-Coated Anti-UV (UV MC), 4.5mm for the Circular Polarizer (C PL) and 9.5mm for the Variable Density Neutral Gray (ND X) they are almost invisible when mounted on your lens. Their weight is so light that you won’t even notice that they are attached. They have been engineered with no compromise: very robust, compatible with all lens caps and multi-coated with EVERCLEAR 5 Coating Technology to withstand almost any conditions. Super lightweight for maximum AF performance and ultra-shallow profile to prevent vignetting.
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Multiple shades of grey
Neutral Density filters are used to reduce the quantity of light that reaches the sensor of the camera. They allow to decrease the shutter speed in order to achieve motion blur (waterfalls, ocean, clouds...) and/or to reduce depth of field in very bright conditions. As they are “neutral”, ND filters do not affect color rendition. With PURE Harmonie Variable Density Neutral Gray filters, users can select the intensity from ND2 (1 f-stop) to ND400 (8+ f-stops) by rotating the front ring.
From ND2 to ND400
PURE Harmonie ND X filter is the result of extensive engineering. That's why it is thinnest than any other variable density filters. It's form factor has been designed so that the external diameter of the filter is wider than the front of your lens, to avoid vignetting issue that may occur.
Neutral accross the whole range
While some vari-nd can become yellowish when increasing density, PURE Harmonie ND X filter remains perfectly neutral.