Table 7-1.–Corrective Treatments–Continued Treatment Keep chin in shadow Have subject lean forward and look at camera Use full, front pose Use low-camera viewpoint Use high-camera viewpoint Use low-camera viewpoint Use low-camera viewpoint Use high-camera viewpoint Keep  neck  in  shadow Keep  in  shadow Turn bad side of face from camera Apply makeup to a pimple or sore spot Problem Double  chin Small  chin Square  face Oval face with a weak chin Short  neck Long  neck Facial   blemishes When the exposure is based on the illumination intensity of  the  main  light,  the  indicated  f/stop  produces underexposed shadow areas of the negative. With black-and-white  negative  film,  the  underexposure  to  the shadow areas may not be enough to cause loss of shadow detail. This is because of the greater exposure latitude and film processing latitude of black-and-white film compared to color negative film. With color negative film, however, underexposure to the shadow areas may cause loss of shadow detail and a color shift in the shadow  areas  that  is  uncontrollable  in  printing. Remember, basing your portrait exposure on the fill light alone applies only when the lighting ratios are within about a 2:1 to 4:1 range. Beyond a 4:1 lighting ratio, you may have to calculate your exposure based on both the main and fill lights. likeness of, and satisfactorily identify the applicant. Passport   photographs   must   meet   the   following requirements: Photographs must be 2x2 inches in overall size. The image size, measured from the bottom of the chin to the top of the head (including hair), shall be not less than 1 inch or more than 1 3/8 inches. A quick method to determine the correct image size is the head should fit inside the frame of a 35mm  slide  mount. PASSPORT   PHOTOGRAPHS Passport  photographs  should  only  be  provided  to United States military personnel, their dependents, and employees  of  the  federal  government  when  required  for executing official orders. Providing such photography for purposes and to individuals other than this is an infringement of the rights and commercial enterprise and  may  violate  U.S.  Navy  Regulations. Passport photographs may be in color or black and  white.  Black-and-white  photographs  that have been tinted or otherwise colored are not acceptable.  Prints  which  have  been  retouched  to the  extent  that  the  applicant's  appearance  has been changed are also not acceptable. However, prints  that  have  been  retouched  merely  to eliminate  shadows  and  lines  are  acceptable. Photographs that depict the applicant as relaxed and  smiling  are  encouraged.  Photographs  should be portrait-type prints, meeting the size and image specifications listed above. Photographs must be clear, front view, full face, with a light, plain  background. Passport  photographs  are  normally  taken  on A  passport  photograph  serves  to  identify  the Polaroid film with a camera designed for passport passport applicant. When glasses, a hearing aid, photographs.  The  photographs  must  portray  a  good a wig, or similar articles are normally worn, these 7-19