If you've ever tried to use the Microadjustment functions on your Canon EOS 5D Mark II, you'll be interested in this story (tho don't yet get too excited if you're a mac user as this is windows only I'm afraid).
Automatic AF Microadjust Calibration Software
Over the past few months, I have spent some time developing an algorithm to perform automatic AF microadjust of a camera and lens combination. After a lot of late nights trying ways of getting working analysis routines and repeatable data, I have finally got to a point where I would like to release this software. At the moment, it has been extensively tested to work with a Canon 5Dmk2, and has been proven to work with a Canon 1Dsmk3, but I will continue to develop it against a 7D and test with the xxD range. It’s also for Windows only (not a Mac as I don’t have one to develop on). Oh, and it’s free.
What does it do?
Have you heard of back-focus or front-focus? Well, Auto Focus Micro-adjust on cameras is meant to allow you to calibrate out any error within the camera’s autofocus system and get all your shots sharp and in focus.
So why do I need software? Well, you don’t (I’d never make a salesman!) For a detailed description of how to calibrate a lens, have a look here (it also includes some details about how the AF system works and why you might need to calibrate).
If you decide you do want to calibrate, then the process can be a little fiddly and this software is meant to automate it to get repeatable results quickly. In my testing, I ran through full calibration of 6 lenses in under 5 minutes.
(cover photo credit: snap from the video)