multi point AF


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May 5, 2006
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#1
Hi Guys,

Can anyone suggest a good reading on those 3 point, 9 point auto focus? What are the advantages and applications? Because so far I've used powershot (3 pt), lumix (9 pt). But I always forced to them to 1 pt auto focus.

Should it be really a deciding factor when buying a cam? Because now I'm confused whether to buy D40 or 400D. Will it make a difference using 3pt against 9pt AF?

Thanks.
 

ExplorerZ

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Jan 9, 2006
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#2
Hi Guys,

Can anyone suggest a good reading on those 3 point, 9 point auto focus? What are the advantages and applications? Because so far I've used powershot (3 pt), lumix (9 pt). But I always forced to them to 1 pt auto focus.

Should it be really a deciding factor when buying a cam? Because now I'm confused whether to buy D40 or 400D. Will it make a difference using 3pt against 9pt AF?

Thanks.
depends if you use them... personally i think 5points is more than enough if all the points are placed at the impt spot (center + interception of one-third rule)... but too bad, so far i think none of the camera does that.

i would say 3pts is more than enough, as some user only stick with center AF point and do AF lock before recomposing
 

compro_1975

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Apr 24, 2005
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#3
lumis 9pts? i thought that was cannon
 

compro_1975

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Apr 24, 2005
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#6
9 pys at a go or different part of the picture and you select one only?
 

May 5, 2006
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#7
always one point(center).. focus then recompose.
 

#8
always one point(center).. focus then recompose.
A lot of photographers use the above method so personally I feel the number of AF points should not be a main consideration in buying a DSLR. More importantly is the weight and the feel. The difference between 3-points and 9-points is just a reflection of how "lazy" a photographer is in determining focus.

No offence to those who uses all 9-points on a 30D;p
 

wind30

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Mar 14, 2004
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#9
Just remember when you focus and recompose there is a slight back focus error.
 

May 5, 2006
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#10
so anyone can share the importance of this 3 point or 9 point AF? :confused: There must be reason why cam manufacturers overly use it as marketing stuff.
 

ExplorerZ

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#11
so anyone can share the importance of this 3 point or 9 point AF? :confused: There must be reason why cam manufacturers overly use it as marketing stuff.
it simply means you got a option to focus on more places without using the tradition method of focus > focus lock > recompose.
 

#12
One of the advantage of having more focus point is when your camera is mounted on the tripod and you do not wish to adjust the camera position any further. Having more focus points is really useful in such situations.
 

westwest1

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Feb 25, 2006
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#13
A lot of photographers use the above method so personally I feel the number of AF points should not be a main consideration in buying a DSLR. More importantly is the weight and the feel. The difference between 3-points and 9-points is just a reflection of how "lazy" a photographer is in determining focus.

No offence to those who uses all 9-points on a 30D;p
so you saying the more points people uses...the more lazy they are...then why canon 1D series got so many points??
 

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