What do they mean - half-press to achieve focus


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fotojoy

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Mar 10, 2005
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#1
Can someone please explain? :dunno:

Is this method used when it is AF or MF? or can be used in both situations?
 

zac08

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Feb 21, 2005
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#2
Can someone please explain? :dunno:

Is this method used when it is AF or MF? or can be used in both situations?
Try it.. depress the shutter button halfway down in autofocus mode.

You should hear the lens actually moving and trying to get into focus.
 

fotojoy

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Mar 10, 2005
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#3
Try it.. depress the shutter button halfway down in autofocus mode.

You should hear the lens actually moving and trying to get into focus.
OH... so it's in AF only lah?

'cos I always use MF so this method doesn't apply lorrr?
 

Youhong

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Dec 30, 2004
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photofreak-alvinz.blogspot.com
#6
Half press in AF mode, the camera will Auto Focus... Keep it half-depressed equals to focus lock... From there, you can re-compose your picture. Of course, if your settings are different, it may not work (Continuous AF or AE/AF Lock button)
 

fotojoy

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#8
if I remember correctly, Manual Focus lens, you have to use your hand to turn the focusing ring on the lens, and view thru the view finder to ahchive in focus.
Okie... so what I've been doing is right lah :)

Thought I was missing out on something.

So why do people use AF instead of MF? :rolleyes:
 

MDZ2

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Feb 23, 2005
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#11
OH... so it's in AF only lah?

'cos I always use MF so this method doesn't apply lorrr?
Not completely true if you are using MF on an AF camera.
AF - you press shutter halfway, activate lens to focus itself.
MF - you turn the lens until you think it is focus, then you press the shutter halfway and the viewfinder indication will tell you if focus is correct. (usually a circle or dot).
Focus lock already explained in post #6
 

MDZ2

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Feb 23, 2005
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#12
AF prefered in general focusing because faster then hand.
MF prefered when many objects fall within the focusing spot (eg shooting animals behind narrow bars or shooting birds in dense foilage) and confuse AF.
 

zac08

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Feb 21, 2005
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#13
Okie... so what I've been doing is right lah :)

Thought I was missing out on something.

So why do people use AF instead of MF? :rolleyes:
Save time and effort? Let the camera work for you. And with a fast lens (like the AF-S types), it's often much faster than MF...
 

zac08

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Feb 21, 2005
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#14
AF prefered in general focusing because faster then hand.
MF prefered when many objects fall within the focusing spot (eg shooting animals behind narrow bars or shooting birds in dense foilage) and confuse AF.
MF is also the way to go for macro shooting...
 

Artosoft

Senior Member
Aug 31, 2005
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#15
When you half pressed, both in MF or AF, the light exposure will work. In AF, the motor will set the lens' distance. In MF, it will check whether subject in focus point is focused.

Regards,
Arto.
 

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