1. (you can dismiss this notice by clicking the X in the upper right hand corner)

    As part of our new initiative on TPF you can come and take part in a series of new in-depth articles and discussions every month. Featured this month are the methods that one of our top avian photographers, Kristofer Rowe uses to get his stunning photos (as also featured on Tamron USA website as well!). So drop in and take part, I know that Kristofer will be happy to answer your questions and hear what you do out in the field with your camera!

    Capturing Distinctive Bird Images

5D mark iii focus issue

Discussion in 'Canon Cameras' started by niklashm, Jan 12, 2013.

  1. niklashm

    niklashm TPF Noob!

    Joined:
    Jan 12, 2013
    Messages:
    4
    Likes Received:
    0
    I recently upgraded to full frame and got myself a 5D iii. When I shoot in landscape mode the auto focus works great, but once I tilt the camera into portrait mode the AF starts to struggle. When there is low contrast it is unable to focus properly. But when in landscape mode I can get the same spot perfectly in focus in a split second. Note that this only happens when using the 61 point Auto selection, the other AF modes works perfectly fine even when the camera is tilted.

    What have I missed here?
     
  2. EIngerson

    EIngerson Been spending a lot of time on here!

    Joined:
    Jul 20, 2011
    Messages:
    2,864
    Likes Received:
    1,177
    Location:
    Okinawa, Japan
    Can others edit my Photos:
    Photos NOT OK to edit
    When you are in portrait orientation are you using a cross type focus point?
     
  3. niklashm

    niklashm TPF Noob!

    Joined:
    Jan 12, 2013
    Messages:
    4
    Likes Received:
    0
    The focus points I use in landscape are not changed when I tilt the camera, if I understood your question correctly.
     
  4. KmH

    KmH Helping photographers learn to fish Supporting Member

    Joined:
    Apr 9, 2009
    Messages:
    35,330
    Likes Received:
    4,391
    Location:
    Iowa
    Can others edit my Photos:
    Photos OK to edit
    Cross type focus point can detect edge contrast both horizontally and vertically.

    Regular focus point can only do one other the other, horizontal, or vertical, but not both.

    Here are some details about the AF module in your 5D MK III -

    Canon does some really strange things.
     
  5. TCampbell

    TCampbell Been spending a lot of time on here!

    Joined:
    Mar 31, 2012
    Messages:
    2,393
    Likes Received:
    1,070
    Location:
    Dearborn, MI
    Can others edit my Photos:
    Photos OK to edit
    When you use auto-selection mode you can't pick the point. The 5D III has 63 points, 41 are cross type (e.g. "+") and work at f/4 or lower and 5 are "dual diagonal" (e.g. "X") type points. But you can't pick the points it uses in the auto-select mode.

    I have a 5D III, but I haven't had any focusing issues. I do have the issue where in auto-select mode it doesn't want to pick the object that I want it to pick, but that's to be expected. The Canon AF system always picks the nearest object available where it can achieve a focus lock. It's better to kick the camera out of auto-select mode when this happens.
     
  6. kathyt

    kathyt Been spending a lot of time on here!

    Joined:
    Oct 11, 2012
    Messages:
    3,726
    Likes Received:
    1,858
    Location:
    IL
    Can others edit my Photos:
    Photos OK to edit
  7. niklashm

    niklashm TPF Noob!

    Joined:
    Jan 12, 2013
    Messages:
    4
    Likes Received:
    0
    AF points are the same for both vertical and horizontal. I've adjusted most of the menu options without any luck.

    When I try to focus at a low contrast area I rarely manage to get it in focus at all, when pointed at a high contrast area it also struggles, and gets in focus first after several seconds. All this when in portrait mode, landscape mode is fast and accurate at the very same spots. I find it weird that it should be such a difference, and that it can't use any focus points once I tilt it above 45 degrees (thats the limit I found).
     
  8. kathyt

    kathyt Been spending a lot of time on here!

    Joined:
    Oct 11, 2012
    Messages:
    3,726
    Likes Received:
    1,858
    Location:
    IL
    Can others edit my Photos:
    Photos OK to edit
    That is strange. I would call Canon. Have you tried multiple lenses to see if you have the same issues?
     
  9. niklashm

    niklashm TPF Noob!

    Joined:
    Jan 12, 2013
    Messages:
    4
    Likes Received:
    0
    I've tried with three different lenses and the same problem occurred with all of them. I also tested them on my 550D, and managed to focus at the same spot without any problems. So the problem is most likely in the 5D iii. I guess I'll have to contact Canon and see if they have a solution.

    Thanks for all the replies though, it's really appreciated!
     
  10. EIngerson

    EIngerson Been spending a lot of time on here!

    Joined:
    Jul 20, 2011
    Messages:
    2,864
    Likes Received:
    1,177
    Location:
    Okinawa, Japan
    Can others edit my Photos:
    Photos NOT OK to edit
    Sorry to hear that niklashm. I hope you resolve it. I'll be keeping track incase mine does that.
     

Share This Page

Search tags for this page
5d mark iii focusing issues
,
baxk focus mark.iii cross point
,
canon 5d mark iii autofocus problems
,

canon 5d mark iii focus issues

,
canon 5d mark iii focus problems
,
canon 5d mark iii focusing problems
,
canon 5d mark iii not focusing
,
canon 5d mark iii sharpness problem
,
canon mark iii focus problems
,
focus problems canon 5d mark iii