Check lens focus

[leica1215]

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It seems many here are talking about the lens focusing issue.

 

Can someone tell me the correct way to check if your lens is at the focus ??

 

Thanks

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[TomB_tx]

I've found the test chart at the link below to be useful. You focus at the center of the scale from and angle of 45 degrees and take a picture, then load it on your PC and view at 100%. Look for the sharpest part of the scale compared to where you focused.

This link has instructions and the chart itself is on page 18. Warning: the document contains another link to focustestchart.com which no longer works, and brings up who knows what! So just print out the chart on page 18.

http://www.dphotojournal.com/focus-test-chart.pdf

[Niko]

I would say don´t start checking your lenses if you haven´t noticed anything wrong shooting normal pictures with it. You might find some small errors doing the tests and then it starts bugging you even if it didn´t matter in the real shooting…

 

Niko (been there, done that)

[TomB_tx]

I would say don´t start checking your lenses if you haven´t noticed anything wrong shooting normal pictures with it. You might find some small errors doing the tests and then it starts bugging you even if it didn´t matter in the real shooting…

While I agree it can cause mental problems, it also has enabled me to know how to fine-tune focusing of my lenses. I know which give sharpest focus just in front or behind the indicated focus. Yes - it could make one send everything off for calibration, but if you know the characteristics you can compensate while shooting.