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-paraxial-gauss-conditions-approximation-serieD.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-paraxial-gauss-conditions-approximation-serieD.gif deleted file mode 100644 index 24f04817e..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-paraxial-gauss-conditions-approximation-serieD.gif and /dev/null differ