Focus Calibration Chart
thingiverse
Quoted from this original website : **"This focus calibration chart can help you test the accuracy of your SLR camera's autofocus, and find the right focus micro-adjust setting if your camera has that feature."** http://www.squit.co.uk/photo/focuschart.html http://www.squit.co.uk/photo/files/FocusChart.pdf Ònshape file: https://cad.onshape.com/documents/59663b4db22fc559186350bb/w/a0901e9fd6231207d4dd03aa/e/a4a2679e48e41d5fd53a1972
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