This chart has 36 density patches with density steps of approximately 0.1, ranging from base density to base+3.4. A nearly circular patch arrangement ensures that vignetting has minimal effect on results. A CSV reference file with actual densities will be supplied. the chart has an active area of 7.75x9.25 inches on 8x10 inch film.
It also contains slanted edges in the center and corners with 4:1 contrast for measuring MTF. The edges have an MTF50 >= 16 cycles/mm, which is about 3 times better than the best inkjet charts. Registration marks make the regions easy to select. A neutral gray background helps ensure that the chart will be well-exposed in auto exposure cameras (compared to charts with black backgrounds, which are sometimes strongly overexposed).
This chart is produced with a high-precision LVT film recording process for the best possible density range, low noise, and fine detail. It is best used with our high uniform light viewer with custom mask made especially for this test chart.