7.Infinity Compensation Mark
Infinity compensation mark
30 50 | ft |
10 20 | m |
200 135100
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.
8. Infrared Index
30 50 | ft |
10 20 | m |
| 200 135100 |
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.