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WAFKT[/b]
<p class="MsoNormal" style="margin: 0in 0in 10pt;"]<span style="line-height: 115%; font-family: 'Arial','sans-serif'; font-size: 12pt;"]I have performed numerous micro adjustments on various lenses.<span style="mso-spacerun: yes;"] The most important part of the process allows you to see the front and back focus range from the selected focus point.<span style="mso-spacerun: yes;"] <o></o>
<p class="MsoNormal" style="margin: 0in 0in 10pt;"]<span style="line-height: 115%; font-family: 'Arial','sans-serif'; font-size: 12pt;"]I use measurement scales (rulers) at a 30 to 45 degree angle. Also the depth of field needs to be as narrow as possible to emphasize what is in and out of focus.<span style="mso-spacerun: yes;"] Example:<span style="mso-spacerun: yes;"] With a scale (yard stick) set to a 45 degree angle, focus at the 18 inch point, (you can put a larger object next to this point to help with focus).<span style="mso-spacerun: yes;"] Take several photos from a tripod, (mirror locked-up, timer release shutter at your normal working distance), and see where the sharpest focus is located.<span style="mso-spacerun: yes;"] This will allow you to check for front or rear focus and by how much.<span style="mso-spacerun: yes;"] Then follow the procedure in the camera&rsquo;s manual to set the micro adjustment to correct any out of calibration focus. Note: you may want the lens to be slightly rear focus.
<p class="MsoNormal" style="margin: 0in 0in 10pt;"]<span style="line-height: 115%; font-family: 'Arial','sans-serif'; font-size: 12pt;"]
<p class="MsoNormal" style="margin: 0in 0in 10pt;"]<span style="line-height: 115%; font-family: 'Arial','sans-serif'; font-size: 12pt;"]Bob<o></o>