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Loswr
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justsomedude said:Here is a good cut-out target you can make... https://dl.dropboxusercontent.com/u/29571216/MicroFocus%20Adjustment.v2.pdf
You need an angled and labeled target so you can determine if your MFA is in front of, or behind, your base condition. It's worth playing with/learning, so you can get better at it in the future. FYI - aim for the zero marker!
Thanks for the link, that's one of the better DIY options available. Most DIY options are flat, and using them at an angle is not optimal for testing the AF system (actual AF points are larger than the little boxes in the VF, and cover many of the 'lines' on the charts - you know you want to focus on a particular one, your camera does not).
FYI, I'd not recommend focusing on the zero marker after assembling the linked chart, for the reason above (the camera doesn't know which of the horizontal lines under the AF point you mean). Rather, use the focus target built right into the chart, the checkerboard pattern indicated below. After assembly, that will end up as a vertical surface (parallel to the camera's image sensor, the best orientation for a focus target) as the chart designer intended. That's why I like this chart, it recapitulates the good features of the commercial tools like LensAlign. My DIY suggestion (below) using a ruler is another option.
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