Taking the subject at further distance.
i.e. When you take the subject by same conditions only changing the subject distance from 2 m to 5 m, the
subject at 5 m shows more area in focus.
If you press the Preview Button, you can check the depth-of-field before releasing the shutter.
INFRARED PHOTOGRAPHY
Visible light and infrared light have quite different wave lengths. To take an infrared photograph, you will have
perform some extra steps as follows.
1 ) Attach the R-60 or equivalent RED filter on the lens
2) Insert the Infrared Film into the camera
3) Set the focus mode to manual focusing mode then focus on the subject manually.
4) Turn the focus ring manually so that the distance scale marking that was previously aligned with the focus
index mark is now aligned with the infrared guide mark "R".
5) Set the exposure following the film's instruction.
6) Release the shutter.
The camera's exposure system is designed use with the visible light and it can not be measure the infrared light.
For more detailed information about infrared photography, please refer to the instructions packed with the
infrared film.
The position of the infrared mark on the Sigma lenses cased on a wave length for infrared light. Depending on
the infrared film, peak sensitivity other then 770 nm may require a slightly different setting. We suggest making
extra exposure at slightly different focus setting to the left and right of the mark.