DoF tooltip clarification

Author: Chman

PostProcessing/Runtime/Models/DepthOfFieldModel.cs

@@ -25,7 +25,7 @@ public struct Settings
             [Range(1f, 300f), Tooltip("Distance between the lens and the film. The larger the value is, the shallower the depth of field is.")]
             public float focalLength;
 
-            [Tooltip("Calculate the focal length automatically from the field-of-view value set on the camera.")]
+            [Tooltip("Calculate the focal length automatically from the field-of-view value set on the camera. Using this setting isn't recommended.")]
             public bool useCameraFov;
 
             [Tooltip("Convolution kernel size of the bokeh filter, which determines the maximum radius of bokeh. It also affects the performance (the larger the kernel is, the longer the GPU time is required).")]