Manual zoom camera is recommended for hard pen, because the camera can enlarge the picture without changing the shooting height, which will not reduce a writing space for people and cause the pen to touch the camera!
Manual zoom camera is recommended for brush, because the handwriting of brush calligraphy will be larger than that of hard pen, so you can see clearly without close-up shooting, zoom function is not needed, and autofocus camera does not need to adjust the focal length, so the picture is automatically clear and easy to use!
Auto-focus camera is generally recommended for painting, because the picture frame is large, the shooting range of auto-focus is also suitable, the picture will be clear automatically, no manual adjustment is needed, there is no aesthetic feeling, the color reproduction degree is better and the color is small.
According to the topic, if you have both, it is better to recommend an autofocus camera.
If the subject still needs to be displayed on the big screen, it is recommended to use an HDMI camera.