diff --git a/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/04.stigmatism and conjugate-points/02.new-course-overview/ray-optics-spherical-refracting-surface-stigmatism-paraxial-gauss-approximation_serieC_L1200.gif b/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/04.stigmatism and conjugate-points/02.new-course-overview/ray-optics-spherical-refracting-surface-stigmatism-paraxial-gauss-approximation_serieC_L1200.gif
deleted file mode 100644
index 1bf49e371..000000000
Binary files a/01.curriculum/01.physics-chemistry-biology/03.Niv3/02.Geometrical-optics/04.stigmatism and conjugate-points/02.new-course-overview/ray-optics-spherical-refracting-surface-stigmatism-paraxial-gauss-approximation_serieC_L1200.gif and /dev/null differ