Canon EF 70-200mm f/2.8L IS II USM Instruction - Page 12

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8. 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 of subjects at

infinity, look through the viewfinder or look at the

magnified image* on the LCD screen while

rotating the focusing ring.

* For cameras with Live View shooting capability.

9. Infrared Index

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.

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.

• 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 when you take the picture.

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