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03-09-2013, 05:32 PM   #1
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Calibrate Lens

Hmmm , just read something about calibrating a lens , is there a DIY guide ..

03-09-2013, 06:16 PM   #2
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I haven't personally done it, but there is quite a good explanation of the process here ---> Lens Calibration Explained
03-09-2013, 06:22 PM   #3
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I think lens calibration is sort of a misnomer- after all, it's the camera AF settings that are being adjusted. Here's our guide to doing it:

Fixing Front and Back Focus - Introduction - PentaxForums.com

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03-09-2013, 07:46 PM   #4
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Thank you ...

03-10-2013, 06:00 AM   #5
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When you say "calibrate lens" do you mean you have an issue with front or back focus? If so, and if you have a camera that has live view, this is the best method I've seen:

AF microadjustment for the 1Ds mark III, 1D Mk3, 5D Mk2, 7D, 1D X
03-10-2013, 07:30 AM   #6
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Im testing the lens , and seeing what works , sometimes the focus is soft , but that might be me , a tripod would eliminate a lot of guess work , I just wanted to see what the cure might be if its the lens / camera not working well together .. ( could be me shooting free hand )
03-10-2013, 11:35 AM   #7
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The technique I find that works best is based on the method in the link from MPrince. Instead of using a tripod and shifting to manual focus I hand hold the camera and auto focus on the pattern. I then move towards and away from the computer screen until I obtain maximum moire and make the adjustment based on whether I'm closer or further away, then retest to confirm the adjustment. I have found that all of my Pentax lenses were good and that only one Tamron lens needed to be adjusted. I hope this helps simplify your calibration process.
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