Vivotek MD9584-HF3 5MP Outdoor Network Mobile Dome Camera with Night Vision, Heater & 3.6mm Lens - Manual (Page 288)

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288 - User's Manual
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PARAMETER VALUE SECURITY
(get/set) DESCRIPTION
buildinpt 0/7 An 32-bit integer, each bit can be set
separately as follows:
Bit 0 => support build-in pan
Bit 1 => support build-in tilt
zoommodule 0/7 Indicate whether to support zoom lens.
In our product, only SD series and IZ
series use the zoom lens.
* Both varifocal and zoom lenses are
built with movable elements that
permit changing the effective focal
length. And the key difference between
a varifocal and a zoom lens can be
explained by thinking about a lens that
has been focused on an object at any
focal length. A varifocal will need to be
refocused whenever the focal length is
adjusted; the zoom will stay in focus
when the focal length is adjusted.