Blender 2.80 RC2; Some questions about the camera

Hello, excuse me. Because of my poor English, it will bring you the same reading, please forgive me.

    I am an engineer who uses Blender to make products. I often need to use MM as the basic unit in use. But when Camera's unit is MM, there will be abnormal model display. I've taken a screenshot of the specific situation.

You need to significantly decrease the Clip End property. Remove a few 0’s. Make sure to do it in the viewport settings (from the N-panel under the View side tab), not just the camera properties.