Sony Drop-In Circular Polarizer for Sony FE 400mm f/2.8 GM OSS Lens Circular polarizing filters suppress glare and reflection for optimum image quality. The VF-DCPL1 circular polarizer can be rotated to achieve the desired polarization while installed in the lens. This filter can reduce or eliminate unwanted reflections (polarized light) from nonmetallic surfaces of water, glass, windows, shiny plastics, ceramics, paper, etc. It also helps you get good contrast when taking photos of blue sky. Generally, reflected light (polarization) should be minimized in photography. However, you can adjust the polarizing degree for the desired effect as well. The amount of light reaching the image sensor decreases. If your camera is set to manual exposure mode and you are using a commercially available exposure meter, or if your camera is set to manual exposure mode and you are using the Manual Flash Control function available on some external flash units, adjust the exposure compensation by opening the aperture by 1 to 2 stops to the + side. Features: Drop-in circular polarizer filter Eliminates reflections and glare Compatible With: Telephoto Lenses: Sony FE 300mm f/2.8 GM Sony FE 400mm f/2.8 GM OSS Sony FE 600mm f/4 GM OSS Attaching this filter: Insert the filter into the lens barrel with the flat cut-off surface of the filter-holder knob facing toward the lens front (1). Push down and turn the filter-holder knob clockwise by 90° to lock the filter (2). *When the filter-holder knob is locked, the index bar on the flat cut-off surface of the filter-holder knob is aligned with the index bar on this filter (3). After replacement of the filter, make sure that the filter-holder knob is properly locked. Using this filter: Adjust the focus precisely while looking through the viewfinder, etc. Rotate the adjustment ring on this filter while looking through the viewfinder, etc., to adjust the polarization degree for photographing. Dimensions: 2.25 x 2.5 x 0.6" Weight: 0.07 lbs Materials: Metal, Optical Glass Manufacturer SKU: VF-DCPL1 In The Box: Sony Drop-In Circular Polarizer for Sony FE 400mm f/2.8 GM OSS LensPlastic Filter CaseLimited 1-Year Manufacturer Warranty
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