Canon 100mm 2.8 macro USM lens question...

Discussion in 'Digital Discussion & Q&A' started by Big, Jul 27, 2009.

  1. Big

    Big TPF Noob!

    Joined:
    Apr 22, 2009
    Messages:
    1,228
    Likes Received:
    0
    Location:
    New Hampshire
    Can others edit my Photos:
    Photos NOT OK to edit
    I just bought a Canon 100mm 2.8 macro USM lens and I noticed that when you focus it manually that when you reach the "limit" it keeps turning even though it's focused to its max. You can keep spinning it around and around. I didn't think this was supposed to do that since my two other lenses stop and you can't turn them any further.
    Is this normal? If not I am on my way back to the area I got it tomorrow and I would really love to know so I can exchange it. It really is a sick lens.
    Thanks!!
     
  2. Derrel

    Derrel Mr. Rain Cloud

    Joined:
    Jul 23, 2009
    Messages:
    35,456
    Likes Received:
    12,795
    Location:
    USA
    Can others edit my Photos:
    Photos OK to edit
    That is the same behavior that my 100/2.8 USM exhibits. It's normal.
     
  3. Big

    Big TPF Noob!

    Joined:
    Apr 22, 2009
    Messages:
    1,228
    Likes Received:
    0
    Location:
    New Hampshire
    Can others edit my Photos:
    Photos NOT OK to edit
    Hmmm strange... I thought I broke it haha. Glad i didn't!:mrgreen:
     
  4. musicaleCA

    musicaleCA TPF Noob!

    Joined:
    May 23, 2009
    Messages:
    2,303
    Likes Received:
    0
    Location:
    Vancouver, BC
    Can others edit my Photos:
    Photos OK to edit
    So you've picked-up all your new gear? If so, you're in for some fun. :)
     
  5. Overread

    Overread has a hat around here somewhere Staff Member Supporting Member

    Joined:
    May 1, 2008
    Messages:
    23,092
    Likes Received:
    3,762
    Location:
    UK - England
    Can others edit my Photos:
    Photos OK to edit
    Yep its totally normal behavour for USM lenses to have that sort of focus function - its part of the setup that allows you to have full manual focus access even when your auto focus is active - ergo you can use AF to focus and then if you wish use the manual focus to adjust the focus if you wish without having to turn off the AF at any point (though I don't recomend doing this if you are using a continous AF mode like AI servo since then the cameras AF will constantly fight against you and that will wear at the motors - but for single AF mode its great)
     

Share This Page

Search tags for this page

can you focus 100mm 2.8 macro manually while in auto focus

,
canon 100 2.8 usm modelmayhem
,
canon 100mm 2.8 af switch
,

canon 100mm macro limit full switch

,
explain focus limit switch on canon macro lense
,
full limit canon
,
limit or full on canon lens
,
limit or full switch macro
,
limiter switch on canon macro what is it
,

switchs 100mm macro lens canon