These transmissive charts are designed to mount directly into the light boxes produced by GTI. The bar-to-bar height and width of the total chart are designed and cut to fit into the GTI light boxes with as little light bleed as possible. Details Substrates These charts are produced on either photographic film with a high-precision LVT film recording process for the best possible density range, low noise, and fine detail, or on a translucent inkjet film. LVT Film Resolution The edges have an MTF50 >= 10 cycles/mm, which is about 2-3 times better than the best inkjet charts. The large patterns are fine enough to produce good results with up to 30 megapixel cameras. Inkjet Film The edges have an MTF50 >= 4 cycles/mm. The large patterns are fine enough to produce good results with up to 10 megapixel cameras.