My 50mm 1.8 and it's AF

Discussion in 'Photography Equipment & Products' started by JeffieLove, Mar 7, 2010.

  1. JeffieLove

    JeffieLove TPF Noob!

    Joined:
    Feb 8, 2010
    Messages:
    1,600
    Likes Received:
    14
    Location:
    Elkton, MD
    Can others edit my Photos:
    Photos OK to edit
    Why doesn't the AF ever work on this??? :(

    It will try, and click and move around... and ... nothing :(

    Is it really that "finnicky" of a lens that it has to be PERFECT for it to actually AF... There are times when I need it to AF instead of having it on MF, but I am afraid to put it on AF because it rarely focuses and I don't want to miss a shot :(

    Any suggestions?
     
  2. Dao

    Dao No longer a newbie, moving up!

    Joined:
    Mar 24, 2008
    Messages:
    6,252
    Likes Received:
    418
    Location:
    St. Louis
    If you talked about the EF 50mm F/1.8 MKII, it should AF with your camera.

    Of course, in some situation, you may not be able to focus correctly due to shadow DoF. i.e. when subject is moving and the shot is taken with F/1.8. By the time you focus it correctly (half-press shutter button), but the subject may move out of the focus when shot was taken.

    Did you try it with a stationary object?
     
  3. JeffieLove

    JeffieLove TPF Noob!

    Joined:
    Feb 8, 2010
    Messages:
    1,600
    Likes Received:
    14
    Location:
    Elkton, MD
    Can others edit my Photos:
    Photos OK to edit
  4. KmH

    KmH Helping photographers learn to fish Supporting Member

    Joined:
    Apr 9, 2009
    Messages:
    38,216
    Likes Received:
    5,001
    Location:
    Iowa
    Can others edit my Photos:
    Photos OK to edit
    If there is not a lot of light in the scene you're trying to shoot AF might not be to reliable.

    You can try turning on the AF assist feature in your camera menus.
     
  5. TiaS

    TiaS TPF Noob!

    Joined:
    Jan 23, 2010
    Messages:
    116
    Likes Received:
    0
    Location:
    Newfoundland
    Can others edit my Photos:
    Photos OK to edit
    I have this lens and I really like it. It is so sharp. Maybe you are too close to your subject. This lens does not take close ups. It simply will not focus on anything close to it. Try backing up a few steps and refocus and than again and again. I find that usually works for me.
     
  6. Derrel

    Derrel Mr. Rain Cloud

    Joined:
    Jul 23, 2009
    Messages:
    35,456
    Likes Received:
    12,794
    Location:
    USA
    Can others edit my Photos:
    Photos OK to edit
    That is the "Mark II". I used to have one. It is, at times, a bit balky at focusing. Its AF performance is in fact, one of the main faults listed by most owners of the lens when they are pressed to evaluate the lens and its performance. I found that under lower-contrast lighting or lower light levels, the lens did not AF nearly as well as the 50/1.4 or the 85/1.8.
     
  7. Dao

    Dao No longer a newbie, moving up!

    Joined:
    Mar 24, 2008
    Messages:
    6,252
    Likes Received:
    418
    Location:
    St. Louis
    Yes, that's the one I was talking about. I owned that lens before but sold it later on after I bought a used MK1 version.

    AF of the lens is slow, but it should not have any problem. Try this. Lay a newspaper or a paper with text on a table. Take a photo of text at an angle and AF on one line.

    Review the result and see if the line that you AF on is in focus. (better use a tripod)
     
  8. JeffieLove

    JeffieLove TPF Noob!

    Joined:
    Feb 8, 2010
    Messages:
    1,600
    Likes Received:
    14
    Location:
    Elkton, MD
    Can others edit my Photos:
    Photos OK to edit
    i will try that this evening after my kids are in bed... It is IMPOSSIBLE for me to get into my "stuido" during the day :/ lol
     
  9. gsgary

    gsgary Been spending a lot of time on here!

    Joined:
    Oct 31, 2008
    Messages:
    16,062
    Likes Received:
    2,813
    Location:
    Chesterfield UK
    Can others edit my Photos:
    Photos OK to edit
  10. JimmyO

    JimmyO TPF Noob!

    Joined:
    Feb 3, 2008
    Messages:
    2,132
    Likes Received:
    0
    Location:
    NJ
    Can others edit my Photos:
    Photos NOT OK to edit
    A tip would be to point the highlited AF sensor at something very contrast in the frame like stiped and lines or things butted up next to each other with very contrasting colors
     

Share This Page

Search tags for this page

canon 1.8 50mm doesnt af