Ernie Aubert Offline Upload & Sell: Off
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You don't need any software (besides a raw converter - assuming you're shooting in raw) to do AF micro adjustment. Just use a sturdy tripod, MLU, and wide-open aperture. Focus at the distance you're concerned about, and take nine shots, with micro adjustment values set to -20, -15, -10, -5, 0, 5, 10, 15, & 20. Look at the files in your raw converter. You'll be able to see the effect of the varying adjustment values. It will be obvious which one is closest; you can then repeat the series with values varying by one, starting from the one that seemed to be closest initially. When you find the one that looks sharpest, use that one. Some cameras allow setting two values for zoom lenses, but I don't think the 1D IV does.
Digital is different from film. With almost all DSLRs, you need to do some sharpening to the files; it's par for the course. There's something called an anti-aliasing filter in front of the sensor (on most DSLRs), and it induces some blurring.
Edit:
Here's a link to a Canon web page that thoroughly describes AF micro adjustment. (It's a bit out of date in that it doesn't reflect the recent availability of two adjustment values (for short and long focal length settings) for zoom lenses), but it's very complete and good:
http://www.learn.usa.canon.com/resources/articles/2011/af_microadjustment_article.shtml
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