The TE270X chart is similar to the TE264 but now has two polarizing filters in the center of the chart. This feature is important for cameras that do not allow a manual adjustment of the exposure because the automatic exposure control (AEC) is fooled by modifying the density (transmission) of the central part of the test chart. Low-end cameras and mobile phone camera systems often do not have a manual exposure adjustment.
The gray patches on the TE270X chart are made from continuous tones and material without any raster. This design is necessary for cameras with a high pixel count that don’t have manual exposure adjustment.
TE270X version 2 (V2) uses the same data measurements as the original version, but has a different hardware design. The first version of the TE270X uses two plates of glass built around the chart film. On occasion we encountered a few problems with stray light and reflections from the glass. Version 2 replaces the glass with a metal frame, which greatly reduces the chance of stray light and reflections.