Canon EF 400mm f/2.8L IS II USM Руководство пользователя - Страница 7

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5. Infrared Index

(EF200mm f/2.8L II USM • EF300mm f/4L

USM • EF400mm f/5.6L USM)

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.

Be sure to observe the manufacturer's

instructions when using infrared film.

Use a red filter also when you take the picture.

6. Depth-of-Field Scale

The depth of field is the distance in front of and

behind the plane of focus on the subject that

appears sharp. The depth of field is indicated by

the area between the depth-of-field scale lines

below the distance scale.

The number on the scale is the F value.

The depth-of-field scale is an approximate

indicator.

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