Canon EF100-400mm f/4.5-5.6L IS II USM Petunjuk Penggunaan Manual - Halaman 12
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7. Infinity Compensation
Mark
Distance index
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 focusing in MF on subjects at infinity
distance, look through the viewfinder or at the
camera's LCD display while rotating the focusing
ring.
Infinity compensation mark
8. 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
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wavelength of 800 nm.
The compensation amount differs depending on
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the focal length. Use the indicated focal length
as a guide when setting the compensation
amount.
Be sure to observe the manufacturer's
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instructions when using infrared film.
Use a red filter when you take the picture.
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