The camera is beautifully built as well, with its sleek aluminium body
exuding class. A Pentax lens is at the business end and features manual
focus and zoom controls and is linked to the camera's power source with a
small external cable allowing the iris to be automatically adjusted as
lighting conditions change. For the 221, Axis has increased the size of
the Sony RGB CCD sensor to 1/3in. for improved light gathering - earlier
models use a 1/4in. sensor.