Infrared Index - EF17-35mm, EF28-70mm, EF70-200mm F2.8L

Article ID: ART154790 | Date published: 06/09/2015 | Date last updated: 08/17/2015


Infrared Index - EF17-35mm, EF28-70mm, EF70-200mm F2.8L


Infrared Index
EF17-35mm, EF28-70mm, EF70-200mm F2.8L

With black and white infrared film, it is necessary to make a slight adjustment in focus using the infrared indices indicated in red on the lens barrel. After focusing as usual, make this adjustment by turning the manual focusing ring to align the focused distance with the infrared index. When shooting, be sure to use a red filter.
  • Switch the focus mode to MF to turn the manual focusing ring for adjustment
  • The position of the infrared indices is based on film usage with a peak sensitivity of 800nm and a red filter (such as Wratten 87). Using black and white infrared film with a different sensitivity may require a slightly different setting. Thus, it is recommended to take trails shots with the focusing ring set slightly to the left and then right of the appropriate index to find the best position.
  • Please carefully read the infrared film manufacturer's instructions and the camera's instruction manual for further details.



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