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22/08/2007, 22h42 #1Membre
- Inscription
- avril 2004
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- Ardennes 08 (FR) Belge expatrié de 4 km
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- Boîtier
- 40D
- Objectif(s)
- Sigma10-20 EX,Canon 17-55 IS,100-400 L IS,100 macro http://fred08.blogspot.com/
En actionnant ce bouton en mode live view on fait la mise au point.
Quand pas en mode live view il sert : AF-ON button :
A welcome addition and a carry-over from the EOS-1D cameras is the dedicated AF-ON button on the rear of the camera to the left of the AE lock button (just 'under your thumb'). This button becomes particularly useful in a continuous focus situation where you want focus to follow the subject while being able to trigger the shutter release independently.
[/I]
A new Custom Function on the EOS 40D allows autofocus during Live View by pressing the camera's AF-ON button. At that point, the reflex mirror goes down and AF is carried out in the normal way. Letting go of the AF-ON button resumes Live View functions. Also, in the Live View shooting mode the user can magnify the image by five or ten times in order to ensure that the shot is optimally focused. Live View is at its best during tripod shooting – particularly for close-up photography where precise focusing is imperative. As a side benefit, the Live View shooting mode helps to reduce vibration by lifting the reflex mirror out of the optical path well in advance of the exposure, improving image quality at slow shutter speeds. A new electronic 1st-curtain shutter function in Live View mode reduces release time lag and operational noise even further to avoid spooking wildlife or disturbing people nearby with unwanted camera sounds. Additionally, as the release time lag is miniscule, even instantaneous movements like a bird taking flight can be readily captured.
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22/08/2007, 22h51 #2
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22/08/2007, 23h04 #3
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