Results 1 to 8 of 8

Thread: Lens Calibrating

  1. #1
    Member
    Join Date
    Feb 2011
    Location
    JB and Singapore
    Posts
    198

    Default Lens Calibrating

    Hi all.. I am quite new. I am currently on Canon lenses. How often do I need to calibrate my lenses? When do I know its time to be done? Can be done DIY or must send to Canon to do it? Thanks!!

  2. #2

    Default Re: Lens Calibrating

    If there is no front/back focusing problem you dont need to calibrate anything at all

  3. #3
    Member
    Join Date
    Feb 2011
    Location
    JB and Singapore
    Posts
    198

    Default Re: Lens Calibrating

    Meaning.. if it can focus... no need to do anything? Unless it cant focus? Thanks.

  4. #4
    Moderator
    Join Date
    Nov 2010
    Location
    Somewhere
    Posts
    3,444

    Default Re: Lens Calibrating

    Quote Originally Posted by Whitestallion View Post
    Meaning.. if it can focus... no need to do anything? Unless it cant focus? Thanks.
    Try http://focustestchart.com/chart.html. This document in the website explains what is Front/Back Focusing and tells you how to check if such problem exists on your lens.

    As for calibration of lens, I think for many lens, you will have to head down to the respective service centers to do it. (Do a google search to see if DIY calibration is possible...http://www.steves-digicams.com/knowl...libration.html)

    Hope this helps
    Too many great equipments but too little quality photos. [My Flickr] | [My Blog]

  5. #5
    Member
    Join Date
    Feb 2011
    Location
    JB and Singapore
    Posts
    198

    Default Re: Lens Calibrating

    Thanks SkyStrike for the resource!

  6. #6
    Moderator Octarine's Avatar
    Join Date
    Jan 2008
    Location
    Pasir Ris
    Posts
    12,420

    Default Re: Lens Calibrating

    Quote Originally Posted by Whitestallion View Post
    Meaning.. if it can focus... no need to do anything? Unless it cant focus? Thanks.
    There are more than one reason for the symptom 'cannot focus'. The test chart helps to determine the focus accuracy. But there are situations (low light / low contrast) where the AF sensor simply cannot get a lock. That's not a fault of the lens and no calibrating will help.
    EOS

  7. #7
    Moderator Octarine's Avatar
    Join Date
    Jan 2008
    Location
    Pasir Ris
    Posts
    12,420

    Default Re: Lens Calibrating

    Quote Originally Posted by Whitestallion View Post
    Meaning.. if it can focus... no need to do anything? Unless it cant focus? Thanks.
    There are more than one reason for the symptom 'cannot focus'. The test chart helps to determine the focus accuracy. But there are situations (low light / low contrast) where the AF sensor simply cannot get a lock. That's not a fault of the lens and no calibrating will help.
    EOS

  8. #8
    Member
    Join Date
    Feb 2011
    Location
    JB and Singapore
    Posts
    198

    Default Re: Lens Calibrating

    Point noted. Thanks!

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
  •