There are 2 options for ceiling mounting the projectors where a drop is required.
The BT880-M and BT880-L. Adjustable Length Ceiling Mounts.
The BT880 can also be used to ceiling mount LCD screens with adaptor BT7588.

The ceiling mounting plate is designed for use on sloping ceilings as well as flat surfaces.
There is a tilt facility at the plate making it suitable for angled ceilings.
The length can be adjusted by a lever (no tools required) which allows for the projector to be mounted at a drop of 50cm to 75cm (ref : BT880-M) and 75cm to 122cm (ref : BT880-L).
It is also at this point, where the projector mount can be rotated allowing for a 360 degree swivel.
The outer tube diameter is 42mm, and the inner tube 35mm.
This means that the BT7035 and BT7042 accessory collars can be used on these tubes.

The Projector is mounted to the BT880 by using an interface kit (eg BT880-UN1, BT880-UN2, BT880-SAN1, BT880-SM2, BT880-SY1 etc).
This is connected to the adaptor plate which also tilts - allowing for maximum flexibility on positioning the projector.

Adjustable ceiling arm.
500mm-750mm drop.
360° Swivel.
90° Tilt at ball joint mount.
Tilt facility at plate for angled ceilings.
Coverplate hides fixing screws.
Maximum weight 10Kg.