Healthy
Workplace
photography
Seminar
Aperture and
Shutter Speed
Exposure
Aperture and
Shutter Speed
Stops
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T h e a m o u n t o f l i g h t t h at s t r i k e s
t h e f i l m / c h i p i s m e as u r e d i n s t o p s
a n d i s a l s o k n o w n as e x p o s u r e
va l u e ( E v )
A difference of 1 stop is a
d o u b l i n g o r h a lv i n g o f t h e
light making the image
A s t o p i s u s e d t o m e as u r e t h e
differences in Ev of apertures,
shutter speeds and film speeds
“ Fas t ” m e a n s t h e c a m e r a c a n
e x p o s e a p h o t o q u i c k ly
Aperture and
Shutter Speed
Shutter Speed
Shutter
Aperture and
Shutter Speed
Shutter Speed
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Controls the amount of time
t h e s h u t t e r o r c u r ta i n i s o p e n
S h u t t e r s p e e d i s m e as u r e d i n
fractions of seconds
D e p e n d i n g o n t h e c a m e r a , i t m ay
show the shutter speed without
t h e n u m e r at o r , i . e . 2 5 0 i n s t e a d o f
1/250
Aperture and
Shutter Speed
Shutter Speed
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Common shutter speeds are
1, 1/2, 1/4, 1/8, 1/15, 1/30, 1/60,
1/125, 1/250, 1/500, 1/1000
A d o u b l i n g o r h a lv i n g o f t h e
t i m e va l u e (Tv) r e p r e s e n t s o n e
s t o p o f EV
A f as t s h u t t e r s p e e d f r e e z e s t h e
action of an image
C o n v e r s e ly, a s l o w s h u t t e r s p e e d
blurs the action of an image
Aperture and
Shutter Speed
Shutter Speed
Fas t s h u t t e r s p e e d
Slow shutter speed
Aperture and
Shutter Speed
Shutter Speed
Fas t s h u t t e r s p e e d
Slow shutter speed
Aperture and
Shutter Speed
Aperture
Aperture
Aperture and
Shutter Speed
Aperture
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Aperture is the size of the hole
i n t h e d i a p h r a g m t h at a l l o w s
light into the camera
The larger the hole, the more
l i g h t t h at e n t e r s t h e c a m e r a
in a given time
A p e r t u r e va l u e s (Av) a r e
m e as u r e d u s i n g f - s t o p s ,
s h o w n as f / # ( i . e . f / 1 6 )
Aperture and
Shutter Speed
Aperture
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T h e i m a g e at l e f t
shows common
f - s t o p va l u e s a n d
how they appear
A change of 1 f-stop
d o u b l e s o r h a lv e s
the light entering
the camera
Smaller f-numbers
represent wider
apertures, and
larger f-numbers are
smaller apertures
Aperture and
Shutter Speed
Aperture
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T h e Av c o n t r o l s t h e a m o u n t o f
depth of field in an image
The wider the aperture, the
more shallow the depth of
f i e l d , a n d v i c e v e r sa
Aperture and
Shutter Speed
Depth of Field
Aperture and
Shutter Speed
Depth of Field
Aperture and
Shutter Speed
Depth of Field
D i s ta n t - d e e p D o F
Close - Shallow DoF
Aperture and
Shutter Speed
Depth of Field
Small Aperture - deep DoF
La r g e A p e r t u r e - S h a l l o w D o F
Aperture and
Shutter Speed
Amount of light
f/2.8
f/5.6
f/11
Aperture and
Shutter Speed
Colour Fringing
Aperture and
Shutter Speed
Av & Tv together
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The wider the aperture used,
t h e l e ss t i m e – i . e . t h e f as t e r
shutter speed – is needed to
p r o p e r ly e x p o s e t h e i m a g e
C o n v e r s e ly, t h e s l o w e r t h e
shutter speed, the smaller the
aperture needs to be
For any image, there are a
n u m b e r o f c o m b i n at i o n s t h at
will make a correct exposure
f-s top
Shutter
s peed
1.4
2
1
1
1000 500
2.8
4
5.6
8
11
16
1
250
1
125
1
60
1
30
1
15
1
8
Aperture and
Shutter Speed
Av & Tv together
Aperture and
Shutter Speed
The end
Aperture and
Shutter speed