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Nikon DSLR Cameras
D7200
Lens calibration frustration
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<blockquote data-quote="Don Kuykendall_RIP" data-source="post: 501733" data-attributes="member: 6277"><p>The proper distance from most things I have read is 50 time the lens length. I generally use the longest part fo the zoom since it has the least DOF. So the 18-140 I would test at 140mm. </p><p></p><p>140mm X 50 = 7000mm or 22.96588 feet round off to 23 feet </p><p></p><p>Are you just looking in the viewfinder or are you loading it into the computer and looking at the focus there? Also if you are just shooting a tape measure what are you letting the auto focus, focus on?</p><p></p><p> </p><p>With fine tuning a lens you have to be very precise and methodical. Anything else then you are just wasting your time and probably making it worse. </p><p></p><p>You can print out this chart and it does a pretty good job</p><p></p><p><a href="http://petapixel.com/2013/03/12/ghettoca-a-diy-lens-calibration-tool-for-micro-adjustment-enabled-dslrs/" target="_blank">GhettoCAL: A DIY Lens Calibration Tool for Microadjustment-Enabled DSLRs</a></p><p></p><p>Make sure to use matte or flat paper and not glossy</p><p></p><p>You can get self stick foam core at Office Depot to mount it all. Again be a precise as you can in printing and setting all this up for the best results.</p><p></p><p>The last thing is to have very good bright lighting. Any thing else is drive you crazy and not give you good results.</p><p></p><p>I tried many systems and methods and was never satisfied with any of them till I bought a software based system</p><p><a href="http://www.reikan.co.uk/focalweb/index.php/versions/focal-pro/" target="_blank">FoCal Pro - Reikan FoCal Automatic Lens Calibration SoftwareReikan FoCal Automatic Lens Calibration Software</a></p></blockquote><p></p>
[QUOTE="Don Kuykendall_RIP, post: 501733, member: 6277"] The proper distance from most things I have read is 50 time the lens length. I generally use the longest part fo the zoom since it has the least DOF. So the 18-140 I would test at 140mm. 140mm X 50 = 7000mm or 22.96588 feet round off to 23 feet Are you just looking in the viewfinder or are you loading it into the computer and looking at the focus there? Also if you are just shooting a tape measure what are you letting the auto focus, focus on? With fine tuning a lens you have to be very precise and methodical. Anything else then you are just wasting your time and probably making it worse. You can print out this chart and it does a pretty good job [url=http://petapixel.com/2013/03/12/ghettoca-a-diy-lens-calibration-tool-for-micro-adjustment-enabled-dslrs/]GhettoCAL: A DIY Lens Calibration Tool for Microadjustment-Enabled DSLRs[/url] Make sure to use matte or flat paper and not glossy You can get self stick foam core at Office Depot to mount it all. Again be a precise as you can in printing and setting all this up for the best results. The last thing is to have very good bright lighting. Any thing else is drive you crazy and not give you good results. I tried many systems and methods and was never satisfied with any of them till I bought a software based system [url=http://www.reikan.co.uk/focalweb/index.php/versions/focal-pro/]FoCal Pro - Reikan FoCal Automatic Lens Calibration SoftwareReikan FoCal Automatic Lens Calibration Software[/url] [/QUOTE]
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Lens calibration frustration
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