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i.
more area in focus.
Using shorter focal l
i.
lens shows more area in focus.
Taking the subject at further dis
i.
m shows more area in focus.
If you press the Preview Butto
e. When you take the subject under the same conditions, changing the aperture value from F8 to F22, F22 shows
ength (wide-angle) lens.
e. When you take the subject under the same conditions only changing focal length from 50 mm and 28 mm, 28 mm
tance.
e. When you take the subject by same conditions only changing the subject distance from 2 m to 5 m, the subject at 5
n, you can check the depth-of-field before releasing the shutter.
INFRARED PHOTOGRAPHY
nt wave lengths. To take an infrared photograph, you will have
era
s on the subject manually.
distance scale marking that was previously aligned with the focus index
system is designed use with the visible light and it can not be measure the infrared light.
d
.
he 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
Visible light and infrared light have quite differe
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 cam
3) Set the focus mode to manual focusing mode then focu
4) Turn the focus ring manually so that the
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
For more detailed information about infrared photography, please refer to the instructions packed with the infrare
film
T
exposure at slightly different focus setting to the left and right of the mark.
47


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