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become fogged. evaluating the negative image, it is necessary to consider the subject matter because less exposure is required for light sandy beaches and snowcovered terrain and more exposure is required for dark terrain, such as forests and industrial sites. negative is completely underexposed or overexposed, the film sensitivity or filter factor (S/C) was set incorrectly or the automatic exposure control (ABC) in the camera system malfunctioned. plane, causing the image to be blurred. The most common indication of insufficient vacuum is crooked data blocks. window, can cause flare (nonimage-forming exposure) of the film. caused by rapid aircraft descent immediately before a photo run. today. One method is the specific tone reproduction method. The second method is simpler and more feasible for shipboard use, so it is discussed in more detail in this chapter. This method is called the trigradient tone reproduction method or the 1.00 print gamma method. uniformity in producing duplicate positives or negatives from original aerial negatives. The overall objective of these recommendations is to ensure that a maximum amount of intelligence information is retained in an optimum form. material must be used. For most duplicating film, the straight line lies between densities of 0.40 to 1.80. Thus the D-min should be close to 0.40 and the D-max should be no more than 1.80 in the duplicate. falls between 0.80 and 1.20, preferably near 1.00. contrast requirement is met when the processing is correct. Specifically, the contrast of the duplicate can be increased or decreased relative to the original by increasing or decreasing gamma, respectively. To achieve these goals, you must use some form of tone control to guide the printing and processing operations. requires that exacting standards and controls be stressed. This helps to ensure that the imagery is of the highest quality. METHOD characteristic curve of the duplicating material being used. METHOD printing and processing requirements. This method allows you to select one of three standardized processes. Each process produces a different contrast or gradient. The processing requirement is selected by determining whether the density range of the duplicate should be increased, maintained, or decreased. By doing so, you can alter the density range of the imagery, if necessary, in each generation. Thus the density range of the final Advanced Photography Course |
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