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BPT Focus Test Chart
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BPT Focus Test Chart

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BPT-focus-chart-example

 

Auto Focusing inaccuracy becomes a real issue when shooting with large aperture lenses. In this example Sony’s Carl Zeiss 135mm f1.8 is shot wide open (at f1.8) revealing a depth of field of less than 10mm. In these circumstances AF accuracy is critical asd any back or front focusing issue will result in key areas of the photo being unsharp.Better Photoshop Techniques issue 21 contains a great article on how to fine tune the Auto Focusing system within you camera. To fine-tune your own camera download BPT's own Focus Chart here and then go to page 34 of the issue for full inctructions.

 


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