Hall & Watts Defence Optics (HWDO) is a company specialising in the production and supply of Opto-mechanical instruments and is well known to the UK Ministry of Defence and Defence Forces worldwide. Company's product range includes: Artillery Sighting System, Artillery Director, Support Weapons Sight, Datum Compass.

HWDO is able to provide and carry out both Repair & Calibration, as well as Training services.

The company has representatives in United Arab Emirates (Hall & Watts (Dubai)) and Australia (Hall & Watts Australia Pty Ltd).