Guangzhou O.E Optics Co., Ltd.  

Product Name: HD Mc Circular Polarizer (CPL) Camera Filter Coating: HMC Customized: Customized Certification: RoHS, CE Lenses Color: Grey Material: Optical Glass Shape: Single-lens Transmittance: >95% Type: Flat Lens Usage: Optical, Photography Trademark: MECO&OEM Transport Package: Regular Specification: 100mm* 105mm, 150mm*150mm, 180mm*180mm Origin: China HS Code: 9002201000 Product Description Glass:Japan Asahi Glass 0.5Glass thickness:0.5mmFilter Ring style:5.5 Gold line rotation filter ringFilter Ring Thickness:5.5mmScrewon Thickness:3.86mmCoating:16 layers with water proof coatingSize:37MM/39MM/40.5MM/46MM/49MM/52MM/55MM/58MM/62MM/67MM/72MM/77MM/82MM/86MM/95MM/105MM/150 100*105/150*150/180*180 TechnologyWorld's most color neutral CPL. Guaranteed.To achieve the worlds most color neutral performance, we had to develop a unique approach to manufacturing rather than selecting off-the-shelf CPL film common among filter manufacturers, which is designed and intended for LCD panels, not photographic optics.All commercially available CPL filters exhibit a yellow cast due to a gradual transmission increase starting around 600nm and then spiking at 650nm onward into IR. With our special customized film we achieved a gradual transmission decrease from 600nm onward, and instead of spiking uncontrollably near 650nm and far into infrared, the HD Mc cpl sees very controlled transmission into IR, without the curve spike. The real world result? Warm and lively images without the apparent color cast. Transmission CurveSpectrometers are optical instruments that can detect spectral lines and measure their wavelength or intensity. Spectrometers can also be used to test the efficiency of an optical filter in order to evaluate color neutral performance.A perfectly flat transmission curve would yield a perfectly color neutral result, and while there is no such thing as a perfectly neutral CPL filter (contrary to what other filter makers may claim) the HD Mc cpl is the most color neutral any CPL filter, guaranteed.When filter makers use off-the-shelf polarizing films originally designed for LCD panels, it produces a predictable transmission increase at 650nm onward and a spike in transmission around around 680nm and into IR. During our research into alternative manufacturing methods, we were able to solve this problem. As a result our HD Mc cpl sees a decline in IR transmission across the visible spectrum and is very well controlled throughout the IR range. Dynamic RangeExpand your dynamic range in-camera.Outdoor photographers frequently struggle with dynamic range, as the human eye has a dynamic range over 20-stops, while a mid-day outdoor scene (like the one below) may range between 15-18 stops. Professional camera systems range between 12-14 stops, and during the last decade very little expansion progress has been made. You can sometimes recover detail in shadows if there's enough data there in post-processing, but you can't remove glare in post-processing, and the removal of glare adds vibrancy, contrast and reveals details that are otherwise unseen.When you rotate a circular polarizer you will see it turn ON and OFF through the viewfinder, allowing you to control the amount of polarization necessary for your shooting situation. The higher in elevation you shoot, the more pronounced the polarization, and the more dynamic range is increased as a result.