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8. Infinity Compensation Mark

To compensate for shifting of the infinity focus

point that results from changes in temperature,

you can rotate the distance scale slightly past

the normal infinity focus mark.

• The infinity position at normal temperature is the point

at which the vertical line of the

with the distance indicator.

• For accurate manual focusing on subjects at infinity

distance, look through the viewfinder to confirm

focusing while rotating the focusing ring.

ENG-10

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 compensation amount differs depending on the

mark is aligned

focal length. Use the indicated focal length as a

guide when setting the compensation amount.

Some EOS cameras cannot use infrared film. See

the instructions for your EOS camera.

• The infrared index position is based on a

wavelength of 800 nm.

• Be sure to observe the manufacturer's

instructions when using infrared film.

• Use a red filter when you take the picture.