Canon Camera Lens EF8-15MM F/4L User Manual

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ENG-9
4.
Infinity Compensation Mark
Infinity compensation mark
Distance index
To compensate for shifting of the infinity focus
point that results from changes in temperature.
The infinity position at normal temperature is the
point at which the vertical line of the L mark is
aligned with the distance indicator on the
distance scale.
For accurate manual focusing on subjects at
infinity distance, turn the focus ring while looking
through the viewfinder or checking the camera’s
LCD display.
The infrared index corrects the focus setting when using
monochrome infrared film. Focus on the subject
manually, then adjust the distance setting by moving the
focusing ring to the corresponding infrared index mark.
• The infrared index position is based on a
wavelength of 800 nm.
• The compensation amount differs depending on
the focal length. Use the indicated focal length
as a guide when setting the compensation
amount.
• Be sure to observe the manufacturer’s
instructions when using infrared film.
• Use a red filter also when you take the picture.
5. Infrared Index
Some EOS cameras cannot use infrared film. See
the instructions for your EOS camera.

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