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09-24-2013, 03:17 PM   #1
konraDarnok's Avatar

Join Date: Aug 2007
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am I too close to my test chart?

Is this a useful image? I want to include a few test charts in an upcoming lens review. I'm generally trying to follow the "tips on photographing the chart" found here.

09-24-2013, 04:01 PM - 1 Like   #2
Ole's Avatar

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The edges of the image frame (viewfinder if a 100% finder or else live view) should match the tick marks on the horizontal frame of the chart. Each frame format (4:3, 3:2, etc.) has their own tick marks.

If you do that the numbers on the chart become meaningful (10 = 1000 line pair per picture height).

However, an APS-C sensor and any decent lens can resolve even the finest pattern on the chart, so for testing APS-C sensor-based equipment you should double the distance to the chart. 10 now means 2000 lp per picture height.

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