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Message: <blockquote data-quote="J-see" data-source="post: 418660" data-attributes="member: 31330">I realize I've been talking too much in my own language again.F/n is simply your sharpest or most common used aperture when shooting macro. For me that was f/7.1. The x is for magnification. 1x is when you shoot at the max of your lens which is 1:1 (when the measurements of your subject equal the measurements on the sensor). A 10mm bug will be 10mm on your sensor.For every two stops you open, you halve your DoF, for every two stops you close, you double it. Or you can adjust magnification to get the same result; 1/4th less magnification doubles DoF, 1/4th more halves it (when using 1:1 as a base).</blockquote>