Resolution Charts can objectively reveal the true resolving power of cameras and lenses in
terms of line pairs per millimeter. Because the chart is flat, a longer lens is required to capture it
without distortion, so we used the same Sigma 65mm T1.5 PL at T4.0 on all cameras.
This Yotta chart (above left) is the professional choice world wide for 8K camera rental
companies wanting to ensure their cameras and lenses meet the highest standards for image
quality.
When photographed from fifty times the focal length of the taking lens, the Yotta chart can
indicate the actual resolutions of any lens/camera combination, up to 250 line pairs per
millimeter (LP/mm).
However, since this was a camera comparison test, all cameras were aligned to a common top
and bottom when framing the Yotta chart. The left and right edges of the sensor frame varied
but were all cut off for a square extraction for the LED Fulldome.
In this case, the Yotta chart showed relative camera resolving power, not the absolute value in
terms of LP/mm.
The chart’s center test patches are sets of concentric circles designed to reveal
camera aliasing, moire patterns, and lens astigmatism on every axis. They are numbered from
four to fifty-five. The lower the number, the higher the relative resolving power of the cameralens
combination.
