Cokin 37mm PURE Harmonie Circular Polarizer Filter

BH #COPHCP37 • MFR #CH164B37A
Cokin
Cokin 37mm PURE Harmonie Circular Polarizer Filter
Key Features
  • Circular Polarizer Filter
  • 2x Filter Factor, +1 Stop
  • Helps to Eliminate Reflections and Glare
  • Reduces Haze in Landscapes
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The 37mm PURE Harmonie Circular Polarizer Filter from Cokin helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface. The light from the sun naturally becomes partially polarized due to reflecting off electrons in air molecules, causing the light to scatter into what appears as haze. A polarizing filter arranges, and filters, this directionally polarized light perpendicularly to the reflected light, allowing for the absorption of much of this light. This results in a noticeable reduction of glare and reflections from non-metallic surfaces and an increase in the saturation of skies and foliage.
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Cokin PURE Harmonie Overview

The 37mm PURE Harmonie Circular Polarizer Filter from Cokin helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface. The light from the sun naturally becomes partially polarized due to reflecting off electrons in air molecules, causing the light to scatter into what appears as haze. A polarizing filter arranges, and filters, this directionally polarized light perpendicularly to the reflected light, allowing for the absorption of much of this light. This results in a noticeable reduction of glare and reflections from non-metallic surfaces and an increase in the saturation of skies and foliage.

A circular polarizer only differs from a linear polarizer in that it contains a quarter wave plane in addition to the linear polarizing filter. The addition of this quarter wave plane is to circularly polarize the linearly polarized light for the use of auto focus and exposure functions. Due to how the light is broken down and filtered with a linear polarizer, auto focus and exposure accuracy become skewed during use. When the light becomes circularly polarized, it permits the use of these functions.

When the 37mm PURE Harmonie Circular Polarizer Filter is applied, 77% of ultraviolet light waves are blocked at 400 nanometers, before which they are progressively eliminated, helping to limit the light that enters a camera to the visible spectrum. The appearance of blue casts that can occur while recording video or still photos under daylight that also features ultraviolet light is reduced, preserving color accuracy throughout the frame.

Cokin PURE Harmonie circular polarizer filters are constructed from Schott glass for increased optical clarity as well as color fidelity, and promote nearly flat attenuation of visible and UV light. This 37mm PURE Harmonie circular polarizer filter features a durable, lightweight, 4.75mm-thick aluminum-alloy filter ring assembly with a front ring that can be rotated to adjust the intensity of the polarization effect. These rings minimize the potential for vignetting, and the front ring also includes corresponding 37mm front filter threads for use with other screw-on filters.

To help eliminate internal ghosting and reflections, each glass surface of the 37mm PURE Harmonie Circular Polarizer Filter features 16 layers of Cokin's EVERCLEAR 5 anti-reflection coating. These coatings are resistant to oil, dust, dirt, and scratches, offering greater protection to the filter and help it to stay clean for longer than with uncoated filters. The coatings are also hydrophobic, resulting in an improved beading effect when in contact with water for greater cleaning efficiency.

Helps to reduce reflections and glare by filtering out light that has become polarized due to reflection from a non-metallic surface.
Polarizing filters arrange, and filter, directionally polarized light perpendicularly to the reflected light, allowing for the absorption of much of the light.
Clears up haze in distant landscapes and provides more saturated, vivid colors.
77% of ultraviolet light waves are blocked at 400 nanometers, before which they are progressively eliminated, reducing bluish cast of daylight when recording video or still photos.
16-layer Cokin EVERCLEAR 5 multi-coating prevents internal ghosting and reflections, is oil, dust, dirt, as well as scratch-resistant, and provides an improved beading effect with water for more efficient cleaning.
Approximately 45% average light transmission.
2x filter factor reduces exposure by 1 stop.
Constructed from Schott glass for optical clarity.
Slim, 4.75mm-thick, aluminum-alloy filter ring assembly helps to prevent vignetting, while remaining lightweight.
Side knurling to provide a more textured grip when mounting or removing from a lens, as well as when rotating the front filter ring to adjust the intensity of the polarization effect.
37mm front filter threads allow for use with other filters.
Plastic case for storage and transport.

Cokin PURE Harmonie Specs

Filter TypeCircular Polarizer
Filter Factor2x (1-Stop)
Circular Size37 mm Filter Thread
RotatingYes
Front Accessory Thread / Bayonet37 mm
CoatingsMulti-Coating
Physical FeaturesSlim
Filter Thickness0.19" / 4.75 mm
Filter MaterialGlass
Ring MaterialAluminum
Packaging Info
Package Weight0.15 lb
Box Dimensions (LxWxH)3.85 x 3.85 x 0.6"
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Does it fit the Canon 16-35 f/2.8 L ii lens ?
Asked by: Anonymous
Does it fit the Nikon 11-16?
Answered by: Vitalii G.
Date published: 2018-08-28

question

Will this filter cause vignetting if used on a Canon EF 10-22mm f/3.5-4.5 USM (@10mm) on top of a standard thickness UV filter?
Asked by: Anonymous
Because one of the filters you are using is a standard thickness, the possibility does exist that there may be vignette, but it should not be a major concern, as the Cokin 77mm PURE Harmonie Circular Polarizer is designed for wide angle lenses.
Answered by: Heather S.
Date published: 2018-08-28

question

Will this filter work without vignetting on a Canon 17-40mm f/4 (used at 17mm) ?
Asked by: Christian O.
The Cokin 77mm PURE Harmonie Circular Polarizer Filter is an ultra thin filter that is designed to reduce vignetting. While it has not been specifically tested with the Canon 17-40mm lens, as the Cokin 77mm PURE Harmonie Circular Polarizer Filter is the thinnest circular polarizer filter on the market (and I have used other thin polarizer filters on this lens), this filter should have the least amount of vignetting of any other filter currently available, if any is perceptible at all. As such, this would be your best option if vignetting is a concern.
Answered by: Manzell L.
Date published: 2018-08-28

question

Can this be used while using the P Series filter holder and filters?
Asked by: Cody C.
I personally do not like the slim filters. I had bought two of them and didn't like them for two reasons - 1. They were difficult to grip to remove, even with a filter wrench or rubber jar opener. 2. Lens caps do not grip well and they easily fall off. I threw these filters in a drawer and bought standard ones.
Answered by: Terri S.
Date published: 2018-08-28

question

Does this fit the Leica DLUX typ 109 / Panasonic LX100 with auto lens cap like the Cokin 43mm PURE Harmonie Multi-Coated UV filter?
Asked by: Paul D.
No, the lens cap will not work with the filter attached.
Answered by: Robert K.
Date published: 2018-08-28
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