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Depth of Field
tr
Profondeur de chomp
When a certain point is focused on, there is a range in
front of and behind that point where sharp focus can be
obtained This range is called depth of field
The depth changes as follows
1 The more stopped down the aperture,
the greater the
depth of field
2. Ihe shorter the focal length, the greater the depth of field
3. Depth of field is smaller in front of the subject and
greater behind the subject,
4. Depth of field is greater when the sublect is far away
a n d s m a l l e r w h e n i t i s n e a r ,
The actual effect of aperture setting can be confirmed in
the viewfinder
when the oreview button on the lens rs
presse0
Preview Button
P r e s s t h e p r e v i e w b u t t o n o n y o u r l e n s T h e
l e n s d i a p h r a g m w i l l s t o p d o w n t o t h e
s e l e c t e d F s t o p T h i s w i l l a l l o w y o u t o s e e
t h e d e p t h o f f i e l d i n t h e v i e w f i n d e r
T h e v i e w f i n d e r w i l l g e t d a r k w h e n t h e
a p e r t u r e i s s t o p p e d d o w n t o t h e s e l e c t e d
s e t t r n g
Lorsque la mise au point est faite d une certaine distance,
il existe une zone de nettete de part et d autre du sulet
Cette plage est appel6e la profondeur
de champ,
La profondeur
de champ change comme suit.
1 P l u s I ' o u v e r t u r e e s t f e r m e e , p l u s l a
p r o f o n d e u r d e c h a m p e s t g r a n d e
2 P l u s l a l o n g u e u r f o c a l e e s t c o u r t e , p l u s l a
p r o f o n d e u r d e c h a m p e s t g r a n d e .
3 L a p r o f o n d e u r d e c h a m p e s t p l u s p e t i t e
d e v a n t l e s u j e t e t p l u s g r a n d e d e r r i e r e l e s u j e t ,
4 . L a p r o f o n d e u r
d e c h a m p e s t p l u s g r a n d e q u a n d l e
s u l e t e s t 6 l o i g n 6 e t p l u s p e t i t e q u a n d i l e s t p r o c h e
L effet reel du reglage de I ouverture
peut 6tre conf irm6 dans
le viseur lorsque le bouton de prevue sur I objectif est presse
Bouton de pr6vue
A p p u y e r s u r l e b o u t o n d e p r e v u e s u r v o t r e
o b j e c t i f . L e d i a p h r a g m e d e l ' o b j e c t i f s e
f e r m e r a s u r l a p o s i t i o n F s e l e c t i o n n e e . C e
q u i v o u s p e r m e t t r a d e v o i r l a p r o f o n d e u r d e
c h a m p d a n s l e v i s e u r
L e v i s e u r d e v i e n d r a s o m b r e q u a n d
I ' o u v e r t u r e e s t f e r m e e s u r l e r e g l a g e
s e l e c t i o n n e .
4 B
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