EuclidI_E and J_E band 1σ asinh limiting surface brightness at the 10″ × 10″ scale (low surface brightness performance) and the nearby Universe: Local Group galaxies are represented by large cyan dots and galaxies up to z = 0.03 by red dots, while the purple ellipses indicate the actual sky area covered by the nearest clusters of galaxies (Virgo, Coma, Fornax, and Hydra are within the RoI). The RoI exhibits a 0.4 mag range in sensitivity for the four Euclid bands from the best area down to the ecliptic plane.