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7. Infinity Compensation
Mark
Infinity compensation mark
30
50
10
20
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 focusing in MF on subjects at infinity
distance, look through the viewfinder while rotating
the focusing ring.
ft
m
200
135
100
8. Infrared Index
30
50
10
20
The infrared index corrects the focus setting
when using monochrome infrared film.
Focus on the subject in MF, then adjust the
distance setting by moving the focusing ring to
the corresponding infrared index mark.
The intermediate marker between 200 and 135
is 150 mm.
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 also when you take the picture.
ft
m
200
135
100
ENG-10