Canopia filter

According to the manufacturer, the glass antireflective Canopia filter reduces fatigue and eye pain.


It has three main features. These features are as follows: reduction of reflections, elimination of E.M.I (electromagnetic emissions) and protection against being banged around. Although this last feature does sound interesting, we can’t see how it relates to fatigue and eye pain. As our lab is not equipped for testing electromagnetic emissions we concentrated (and in any case this is the subject of our article) on reduction of reflectivity.

Is the screen less reflective?

Like the 3M filter, this one can be removed. It is attached to the screen with a black plastic grip that you put on top of the monitor. There was a significant reduction in brightness on our test screen after we put the filter into place: it fell from 83cd/m², to 50 cd/m². The colours didn’t change once the screen was calibrated. We noticed that the screen was slightly less reflective but not significantly so. Moreover, depending on the viewing angles, the reflections sometimes tend towards violet, which isn’t an improvement.

Canopia are based in France. For more information on the technology used in these filters, consult the Canopia site (in French or German).