Tiffen 4 x 5.65" 80D Hot Mirror Filter light 8 density creates a darkening

8 density creates a darkening of the entire image

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and 5 are also available where this filter type's effect becomes approximately twice as strong with each grade number increase

neutral density (up to 6-stops

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Tiffen 4 x 5.65" 80D Hot Mirror Filter light 8 density creates a darkeningTiffen W4565080DHM Overview The Tiffen 4 x 5. 65" 80D Hot Mirror Filter is a combination of both a hot mirror infrared control filter and an 80D color temperature correction filter. HD camera's without an infrared control filter benefit from greater sensitivity to the red area of the spectrum, however in order to achieve this they are also more susceptible to infrared pollution; a hot mirror counters this by blocking infrared radiation from reaching