Canon EF 70-200mm Manuel d'instructions - Page 10

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5. Infinity Compensation Mark

Distance scale

To compensate for shifting of the infinity focus

point that results from changes in temperature,

there is a margin at the infinity (∞) position.

The infinity position at normal temperature is the

point at which the vertical line of the distance

scale L mark is aligned with the distance index.

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.

Infinity compensation mark

Distance index

6. Infrared Index

Distance scale

The infrared index corrects the focus setting when

using monochrome infrared film. Focus on the subject

manually, then adjust the distance scale indicated by

the distance index by moving the focusing ring to the

corresponding infrared index mark before shooting.

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 (large at the wide end, small

at the telephoto end). Use the 100 or 70 (mm)

infrared index position as a guide when setting

the compensation amount manually.

Be sure to observe the manufacturer's

●

instructions when using infrared film.

Use a red filter when you take the picture.

●

Infrared Index

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