diff --git a/libs/geom/include/psemek/geom/camera.hpp b/libs/geom/include/psemek/geom/camera.hpp
index 976e9443..9731dc41 100644
--- a/libs/geom/include/psemek/geom/camera.hpp
+++ b/libs/geom/include/psemek/geom/camera.hpp
@@ -60,6 +60,9 @@ namespace psemek::geom
 		float far_clip;
 
 		matrix<float, 4, 4> projection() const override;
+
+		// aspect_ratio = width / height
+		void set_fov(float fov_y, float aspect_ratio);
 	};
 
 	struct spherical_camera
diff --git a/libs/geom/source/camera.cpp b/libs/geom/source/camera.cpp
index 117affce..cb433bc8 100644
--- a/libs/geom/source/camera.cpp
+++ b/libs/geom/source/camera.cpp
@@ -96,6 +96,12 @@ namespace psemek::geom
 		return perspective<float, 3>(fov_x, fov_y, near_clip, far_clip).homogeneous_matrix();
 	}
 
+	void perspective_camera::set_fov(float fov_y, float aspect_ratio)
+	{
+		this->fov_y = fov_y;
+		fov_x = 2.f * std::atan(aspect_ratio * std::tan(fov_y / 2.f));
+	}
+
 	matrix<float, 4, 4> spherical_camera::view() const
 	{
 		return