![]() Set up the tool on a table or ideally a small tripod, and set your camera up on a stable tripod. The easiest way to perform an AFMA is with a commercial tool, such as the LensAlign MkII or the DataColor SpyderLensCal (see the discussion below for an explanation of common failings of printable test charts and moiré patterns, and a reasonable workaround). This tip comprises two main sections, a practical summary of the procedure for those who want to dive right in, followed by more technical discussion, including some DIY options for a testing setup. AFMA will have the greatest benefit for lenses with fast apertures (f/2.8 and wider), because the thin depth of field at wide apertures makes even small focus errors more evident. It is a feature that is present only on certain models of Canon dSLRs (currently, the 50D, 7D, 5D Mark II, 1D Mark III, 1D Mark IV, 1Ds Mark III, and 1D X). ![]() B&H Deal Zone: Lexar 64GB Pro CFexpress Type-B – Only $59.99 (Save $30.00), Lowepro Photo Active 300 AW Backpack – Only $69.99 (Save $120.00)Īutofocus microadjustment (AFMA) is a procedure that allows a user to correct for small errors of front- or back-focusing.Just Posted: Sigma 50mm F1.4 DG DN Art Lens Review. ![]()
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