Canon EF-S35MM F/2.8 MACRO IS STM Petunjuk Manual - Halaman 12
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5
Exposure When Taking Close-up (Macro) Shots
Setting the Exposure
When taking photographs using TTL metering,
no exposure compensation is necessary to meter
the light coming through the lens.
With TTL metering, AE (autoexposure) is possible
at all focusing distances. Just set the desired
picture-taking mode, then check the shutter
speed and aperture before taking the picture.
Magnification and Effective f-number
The aperture displayed by the camera assumes
that the focus is set to infinity. The actual
aperture (effective f-number) becomes darker
(effective f-number increases) at closer focusing
distances (magnification increases). This does
not cause exposure problems for normal picture-
taking. However, for close-up photography, you
cannot ignore the change in the effective
f-number.
Conditions prevalent with the subject are very
●
●
important when deciding on the correct level
of exposure for close-up (macro) shots. It is
therefore recommended that exposure levels are
amended as much as possible during shooting,
or that the image of the subject is checked on
the camera's LCD monitor.
Using either the aperture-priority AE (Av) mode
●
●
or manual exposure (M) mode is recommended
for close-up (macro) photography, as these
make it easier to adjust the depth of field and
exposure.
When you use a handheld exposure meter to set
the exposure, you must take into account the
exposure factor shown in the following table.
Magnification
Focusing Distance
(m/ft.)
Effective f/No.
Exposure Factor (stops)*
*
Upper values: 1/3 stops. Lower values: 1/2 stops.
0.3
0.5
0.7
0.21/
0.17/
0.14/
0.13/
0.69
0.56
0.46
3.3
3.5
3.7
+1/3
+2/3
+2/3
+1/2
+1/2
+1/2
ENG-11
1.0
0.43
4.0
+1
+1