Siemens Star (Back Focus Chart) in 4K
#Siemens #Star #Focus #Chart
“Renz”
The Siemens Star, also known as a back focus chart, can be used to adjust the back focus of your lens.
It’s also useful to test displays or calibrate image processing (like sharpening filters).
This is the UHD-version of my previous video, using a better source vector image by Leonhard…
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