For the Tamron the stated minimum focal distance is 38 cm (15 inches); in both cases the test is probably at or slightly less than the MFD. Given that the test doesn't look that different between lenses other than the onion bokeh on the Tamron. It's hard to compare as the focal length and angle between the two shots is different.
For MFA Canon states to do it at 50 x focal length or at the normal distance at which the lens is going to be used.
Thanks for that. I just did this test with the Tamron at a distance of 15" away from the batteries @ 70mm. I started with 0 microadjust, and each following picture increased microadjust by +5, so 0, +5, +10, and +15.
Keep in mind the center focus point is aimed at the 3rd from left Duracell battery. Can someone recommend which microadjust amount would be appropriate for my copy?
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