... neutral density filter test. As Glaser (1979) described, a 2-log unit neutral density filter (which reduces incident illumination by a factor of 100) will cause little or no reduction in visual acuity in an eye with functional amblyopia ...
... neutral density filter can work by reflection or by absorption. A partially “silvered” (i.e., coated) mirror will reflect some portion of the light teaching it and transmit the remainder. Absorptive neutral density filters are color ...
... neutral density filter can allow the detail in a scene to appear on film as it does to the The best of graduated ND filters are rectangular , not round , pieces of glass or plastic with both dark and clear halves . The dark half is ...
... neutral - density filter . The performance of neutral - density filters is usually defined in terms of the optical density , D : D = log10 ( 10 / IT ) where lo is the incident intensity and IT is the transmitted intensity measured ...
... neutral density filter effect , and eccentric fixation . The crowd- ing phenomenon relates to the fact that patients with amblyopia have better visual acuity reading single optotype than reading multiple optotypes in a row ( linear ...
... neutral density filter and a x10 filter used together have a combined filter factor of 20 ( = 2 x 10 ) ; expressing the same thing logarithmically , filters with densities of 1.0 and 0.3 , used together , have a combined density of 1.3 ...
... neutral density filter is a light reduction device that eliminates overly bright , washed out images without affecting color rendition , or what the color is supposed to look like . You can recognize these filters because they are dark ...
... neutral density filter . Another use of neutral density filters is to quantify the amount of APD to allow longitudinal comparisons in a given patient or correlation with other visual parameters . This is done by placing increasing ...
Explains the fundamentals of exposure and how varying three parameters--shutter speed, aperture, and ISO--can be used creatively and practically to determine correct exposure, but deliver substantially different images.
... neutral density filter . Neutral density filters are useful in photography . A 50 Percent transmitted 100 50 -spectral nonspectral monochromatic 0 400 500 600 700 Wavelength ( nm ) FIGURE 8.7 Transmittance curves for three different ...