Can I mount LF2/2+ to the ceiling?

Yes, you can mount the LF2 to the ceiling, but there are a few things to keep in mind:

• The LF2/2+ can be mounted upside down if using as intended for projection mapping purposes. Within Lightform Creator, there is a button to change the projector mode (front, rear, etc.) to invert the image accordingly. However, if you are planning to use the LF2 to act as a regular projector, to watch movies for instance, you will need to use your remote to access the projector settings. If your remote menu isn't coming up, make sure that your device is updated and on the latest firmware.
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• We have deactivated the autofocus and the auto keystone capabilities as they interact with our scanning workflow. 
• The LF2/2+ "feet" unscrew to reveal M4 mounting points (e.g., for a universal projector/ceiling mount), so any 3rd party ceiling/universal mount should work. We sell a mounting plate for the LF2/2+ that is specifically for this purpose here. 

You can see the full specs here https://lightform.com/lf2#specs