You can set this up using meraki vision portal instead of dashboard.   https://community.meraki.com/t5/Feature-Announcements/NEW-Multi-Network-Video-Walls-on-Vision-Portal-BETA/ba-p/154394 ... View more

When this happens, you can adjust the aperture settings under video settings in the dashboard and then run auto focus for the entire frame.  This usually fixes it. ... View more

If you have a floor plan of where you are installing the camera, you can use the Meraki Camera Blueprint URL below to plan and check what the picture quality will be at different distances from the camera.   https://meraki.cisco.com/public/mv-site-survey/index.html  ... View more