5-50mm CS mount CCTV lens (Westmill SG5)

This is a 5-50mm 1:1.6 varifocal 3MP manual iris lens. Suitable for cameras with either a 1/3" or 1/4" sensor.
Good colour reproduction and some barrel distortion at wide angle, It provides wide and clear vision, but is rather fiddly to focus.
To help me choose a recipient, tell me what you need this lens for.