Page 1 of 2 12 LastLast
Results 1 to 20 of 27

Thread: How do you get sharp focus on moving subjects?

  1. #1

    Default How do you get sharp focus on moving subjects?

    hi, I am using a canon 20d, an old cam without any face regconition. so if i want to shoot a person running, how can i get a sharp focus on the face, esp with all those possible focusing points?

    Please share your experience. Many thanks in advance.
    Come visit my blog

  2. #2

    Default Re: How do you get sharp focus on moving subjects?

    I think you need to pan the shot, with the focus point set on the face.
    α850 | SAL2470Z | SAL135F18Z | SAL70200G | SAL50F1.4

  3. #3
    Moderator ortega's Avatar
    Join Date
    Nov 2004
    Location
    Singapore, Singapore, Singapor
    Posts
    23,686
    Blog Entries
    7

    Default Re: How do you get sharp focus on moving subjects?

    focus

    fast shutter speed/flash to freeze subject
    or panning

  4. #4

    Default Re: How do you get sharp focus on moving subjects?

    Quote Originally Posted by barracuda View Post
    hi, I am using a canon 20d, an old cam without any face regconition. so if i want to shoot a person running, how can i get a sharp focus on the face, esp with all those possible focusing points?

    Please share your experience. Many thanks in advance.
    Who the heck needs face detection? All the sports photogs out there have no "face detection". Learn how to use the camera instead of relying on marketing gimmicks.
    Alpha

  5. #5

    Default Re: How do you get sharp focus on moving subjects?

    Use Continuous AF instead of Single AF would help.
    Looking for Photographers? | My Portfolio
    http://www.photoera.uni.cc/ | http://folio.navlem.com/

  6. #6
    Senior Member Anson's Avatar
    Join Date
    Jul 2006
    Location
    ansonchew.com
    Posts
    8,209

    Default Re: How do you get sharp focus on moving subjects?

    Since you are using a Canon system... use "AI Servo"... to keep your moving subject in focus.... example as shown below:


  7. #7
    Senior Member
    Join Date
    Nov 2004
    Location
    East side
    Posts
    3,704

    Default Re: How do you get sharp focus on moving subjects?

    1. Anticipation.
    2. Dynamic AF
    3. Pre-focus, or using manual focus.

  8. #8

    Default Re: How do you get sharp focus on moving subjects?

    since when did SLRs have face detection anyway?

    oh wait. my d300 does have some sort of focus preference for a person's eyes. but it can't always be relied on anyway.

    the alternatives are to lock the focus point on the eyes and use dynamic AF and AF tracking, and to shoot bursts. it's about probability as well.

  9. #9

    Default Re: How do you get sharp focus on moving subjects?

    I think D90 have face-detection..
    Looking for Photographers? | My Portfolio
    http://www.photoera.uni.cc/ | http://folio.navlem.com/

  10. #10
    Senior Member Anson's Avatar
    Join Date
    Jul 2006
    Location
    ansonchew.com
    Posts
    8,209

    Default Re: How do you get sharp focus on moving subjects?

    Quote Originally Posted by navlem View Post
    I think D90 have face-detection..
    Only in LV mode... and the AF is slow......

  11. #11

    Default Re: How do you get sharp focus on moving subjects?

    [QUOTE=Anson;4910493]Since you are using a Canon system... use "AI Servo"... to keep your moving subject in focus.... example as shown below:

    [QUOTE]

    What is the difference between AI servo & AI Focus? They seem to be the same to me.
    Last edited by barracuda; 22nd March 2009 at 08:55 PM.
    Come visit my blog

  12. #12
    Senior Member Anson's Avatar
    Join Date
    Jul 2006
    Location
    ansonchew.com
    Posts
    8,209

    Default Re: How do you get sharp focus on moving subjects?

    Quote Originally Posted by barracuda View Post
    What is the difference between AI servo & AI Focus? They seem to be the same to me.
    AI Servo is Continuous Focus (CF)... while AI Focus... is Single Shot follow by CF...

  13. #13
    Member
    Join Date
    Feb 2007
    Location
    Pandan Gardens
    Posts
    404

    Default Re: How do you get sharp focus on moving subjects?

    well. I would just set it at shutter priority with AI servo.

    then I would shoot at 1/125, 1/250, etc, depending on the situation.

    AI servo rocks. you should practise it by doing by panning some cars and stuff. perhaps you could try focusing on something like the car plate or the headlights.

  14. #14
    Member
    Join Date
    Jan 2005
    Location
    Sengkang
    Posts
    311

    Default Re: How do you get sharp focus on moving subjects?

    Also helps to have a "reasonable" DOF. If shooting at large apertures and DOF is only a few cm, then chances of OOF pic is higher.

  15. #15
    Senior Member
    Join Date
    Jan 2005
    Location
    Pasir Ris, Singapore
    Posts
    14,002

    Default Re: How do you get sharp focus on moving subjects?

    Quote Originally Posted by barracuda View Post
    hi, I am using a canon 20d, an old cam without any face regconition. so if i want to shoot a person running, how can i get a sharp focus on the face, esp with all those possible focusing points?

    Please share your experience. Many thanks in advance.
    I think face recognition is not integrated into Canon's DSLRs, only the compacts. Anyway use AI Servo and pan, make sure that your shutter speed is enough.
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  16. #16
    Senior Member Anson's Avatar
    Join Date
    Jul 2006
    Location
    ansonchew.com
    Posts
    8,209

    Default Re: How do you get sharp focus on moving subjects?

    Quote Originally Posted by Snoweagle View Post
    I think face recognition is not integrated into Canon's DSLRs, only the compacts. Anyway use AI Servo and pan, make sure that your shutter speed is enough.
    Canon's 5DM2 does have face detection (not recognition), however it can only be used in LV... and it is slow....

  17. #17

    Default Re: How do you get sharp focus on moving subjects?

    I used to be a sniper. Times was good no war so i now snipe with a cam. Its the only thing i am good with in life i guess. The principle of this 2 profession's the same. You locked on and trail your target, or you aim ahead predicting your target's next approaching location.

  18. #18
    Senior Member
    Join Date
    Jan 2005
    Location
    Pasir Ris, Singapore
    Posts
    14,002

    Default Re: How do you get sharp focus on moving subjects?

    Quote Originally Posted by Anson View Post
    Canon's 5DM2 does have face detection (not recognition), however it can only be used in LV... and it is slow....
    Maybe it's a prototype for DSLRs.
    Canon EOS 5D, 24-70 f/4 L IS, 50 f/1.2 L, 70-300 f/4-5.6 L IS, 600EX-RT. Sigma 12-24 f/4.5-5.6 EX.

  19. #19
    Senior Member Anson's Avatar
    Join Date
    Jul 2006
    Location
    ansonchew.com
    Posts
    8,209

    Default Re: How do you get sharp focus on moving subjects?

    Quote Originally Posted by Snoweagle View Post
    Maybe it's a prototype for DSLRs.
    Actually it is quite common in some of the new dslr... Olympus, Nikon & Canon all have at least 1 dslr model that have face detection....

  20. #20
    Member
    Join Date
    Dec 2005
    Location
    Singapore, Bedok
    Posts
    1,129

    Default Re: How do you get sharp focus on moving subjects?

    AI servo is continuous focus mode, the camera will assume the subject is moving and attempt to focus accordingly, partly by predicting the subjects distances wrt the camera.

    For AI Focus, the camera will decide whether the subject is stationary or moving, and dynamically select the appropriate focusing mode accordingly. i.e. If subject starts to move, it will switch to AI Servo, and when subject stops, it will switch to one shot, provided you're constantly half-pressing the shutter button all the while.

    Basically, if you trust the camera's AI, you can leave the camera on AI Focus 100%. However, in practical shooting, usually pple don't trust the camera's AI, and preferred to tell the camera what mode to use depending on the situation.

    Guess the default setting is AI Focus for Full Auto mode.


    Quote Originally Posted by barracuda View Post

    What is the difference between AI servo & AI Focus? They seem to be the same to me.

Page 1 of 2 12 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •