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Thread: multi point AF

  1. #1

    Default multi point AF

    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.

  2. #2
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    Default Re: multi point AF

    Quote Originally Posted by fz30_user View Post
    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

  3. #3

    Default Re: multi point AF

    lumis 9pts? i thought that was cannon

  4. #4
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    Default Re: multi point AF

    Quote Originally Posted by compro_1975 View Post
    lumis 9pts? i thought that was cannon
    fz series got a 9 point af as well.

  5. #5

    Default Re: multi point AF

    Quote Originally Posted by ExplorerZ View Post
    fz series got a 9 point af as well.
    yup. quite good but i still use 1 pt.

  6. #6

    Default Re: multi point AF

    9 pys at a go or different part of the picture and you select one only?

  7. #7

    Default Re: multi point AF

    always one point(center).. focus then recompose.

  8. #8

    Default Re: multi point AF

    Quote Originally Posted by fz30_user View Post
    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

  9. #9

    Default Re: multi point AF

    Just remember when you focus and recompose there is a slight back focus error.

  10. #10

    Default Re: multi point AF

    so anyone can share the importance of this 3 point or 9 point AF? There must be reason why cam manufacturers overly use it as marketing stuff.
    Last edited by fz30_user; 1st February 2007 at 09:02 PM.

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    Default Re: multi point AF

    Quote Originally Posted by fz30_user View Post
    so anyone can share the importance of this 3 point or 9 point AF? 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. #12

    Default Re: multi point AF

    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.
    Pictures always should have a special story behind it or a special meaning to the photographer.

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    Default Re: multi point AF

    Quote Originally Posted by moriahphotos View Post
    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
    so you saying the more points people uses...the more lazy they are...then why canon 1D series got so many points??

  14. #14
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    Default Re: multi point AF

    i have a 45 AF-pt camera and i use the middle AF point 90% of the time
    eat. drink. shoot

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    Default Re: multi point AF

    marketing purposes i suppose.

    Quote Originally Posted by westwest1 View Post
    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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