DS-1272ZJ-120

Yes, enter the Camera OSD menu and go into the main menu, enter the day/night sub menu where you will see an option labelled INFRARED, set this option to CLOSE to disable the infra red output in periods of low light - remember to save your changes before...

The F series cameras have a different aspect ratio therefore the field of view differs from the D series, the approx field of view for the F series is 80 degree for 2.8mm lens models and 60 degree for 3.6mm lens models.

This is an anti reflective cover and prevents IR from reflecting back towards the LED array, it provides approximately an extra 10% illumination from the IR in night time conditions.