Depth of Field relates to the distance from the camera to the target so it is not a vertical plane but a sphere. What that sphere touches is what is focused and with super horizontal frames or images you really feel this diference.
One other thing is that rendering is great and producing videos also, but WE all use the real time feature the most so there should be an option to have depth of field but with this white plane invisible
Thank you for sharing your insights about Depth of Field - that’s an interesting perspective. To better understand your request, could you share some visual examples of what you would like to achieve? Would you like to adjust the DoF manually or you expect this to be done automatically ?