All you need to know about LensAlign and focus issues is right here.
LensAlign™ Pro - Sighting.
Learn how easy it is to align the LensAlign to the camera/lens under test.
LensAlign™ Pro - AF Adjustment
Learn how to calibrate a DSLR to a specific lens using the LensAlign and the Micro-Adjustment feature of the Canon 50D
LensAlign™ Pro and Manual Focus Lenses.
This video shows the results of testing a Zeiss Manual Focus 100mm ƒ2 lens on a Nikon D700. When testing manual focus, the results will be the same on any manual focus lens, as any mis-calibration is within the camera, not the lens. These results were duplicated using a Nikkor 105mm ƒf2.8 lens (not shown).