Highlights ND090 absorptive neutral density filters have an optical density of 0.9, or approximately 12.5% transmission across the visible spectrum. These filters include identical male and female threads on either end so that they can be stacked with other ND filters to achieve various optical densities. For example, the result from stacking two ND090 filters … Continued
ND400 absorptive neutral density filters have an optical density of 4.0, meaning that they transmit an average of 0.01% of visible light. Surprisingly, this amount of light passing through the filter is easily detectable by the human eye. Because the glass substrate is absorbing 99.99% of the light that passes into the filter, it is … Continued
ND300 absorptive neutral density filters have an optical density of 3.0, meaning that they transmit an average of 0.1% of visible light. These filters include identical male and female threads on either end so that they can be stacked with other ND filters to achieve various optical densities. Because the glass substrate is absorbing 99.9% … Continued
ND200 absorptive neutral density filters have an optical density of 2.0, transmitting an average of 1% of the visible spectrum. These filters include identical male and female threads on either end so that they can be stacked with other ND filters to achieve various optical densities. Stacking two ND200 filters together, would be nearly equivalent … Continued
ND120 absorptive neutral density filters have an optical density of 1.2, averaging 6.25% transmission over the visible spectrum. These filters include identical male and female threads on either end so that they can be stacked with other ND filters to achieve various optical densities. For example, the result from stacking two ND120 filters together would … Continued
ND060 absorptive neutral density filters have an optical density of 0.6, or approximately 25% transmission within the visible spectrum. These filters include identical male and female threads on either end so that they can be stacked with other ND filters to achieve various optical densities. For example, two ND060 filters stacked together would be approximately … Continued
ND030 absorptive neutral density filters have an optical density of 0.3, or approximately 50% transmission across the visible spectrum. These filters include identical male and female threads on either end so that they can be stacked with other ND filters to achieve various optical densities. For example, two ND030 filters stacked together would perform approximately … Continued
