John_T Offline Upload & Sell: Off
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I think you mean 24-70 2.8L, a lens for which you can have pretty high expectations.
The 50 f/1.4 is not of the same caliber, so while it can be very sharp at mid apertures, it is not very good, especially in the corners, at other apertures. It can also be inconsistent in auto focusing.
So my suggestion is to examine the characteristics of your gear first, then explore what might make it perform better. Calibration will adjust where the plane of focus falls, but will in no way improve your lens optics.
Here are a couple of sites where you can read test reports on the gear you have:
http://slrgear.com/reviews/showproduct.php/product/143/cat/11
http://www.the-digital-picture.com/Reviews/Canon-EF-50mm-f-1.4-USM-Lens-Review.aspx
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