Above it was a bank of several independently focusable light fixtures.

A good quality camera might come with a variety of interchangeable, focusable lenses or possibly a single zoom lens.

By convention, the tab key is used to move the focus to the next focusable component and shift + tab to the previous one.

Specifies a focusable area in a .

Formerly, many police officers carried Maglites, as they are durable, focusable, and generally produce better output than inexpensive mass market flashlights.

The video image is relayed from the distal tip and focusable lens assembly back to the display via internal wiring.

Focusable lights may move the reflector or lens or they may move the emitter.

For example, pressing the "up" arrow key will focus on the closest focusable element on the top (relative to the current element).

Ellipsoidal reflectors often are used for tight, focusable spots, although they can be used for floodlights, such as in scoops (see below).

Any metal has an sonic impedance and velocity higher than those of the water-based liquid; these help make the shock-wave strong and spatially focusable.

Johann Zahn (Germany) developed a portable SLR camera obscura with focusable lens, adjustable aperture and translucent viewing screen.

This process is not very efficient, but it has advantages, in that the light is coherent and focusable, meaning that devices can make much more efficient use of the light.

In computing, spatial navigation is the ability to navigate between focusable elements, such as hyperlinks and form controls, within a structured document or user interface according to the spatial location.

To recap on a bit of history here, a few years ago I reported on a very cool experiment, one that allowed researchers to get a nice focusable beam of light through a scattering medium, such as a sugar cube.

Random motions such as that of wind-driven tree foliage, vehicles driven over rough terrain, or humans or other animals walking or running generally render those items not focusable, resulting in blurring or even effective invisibility.

"The key issue is whether that power of innovation is disciplined and focusable on mission-critical issues, rather than on a thousand interesting directions at once," said Moses Ma, editor of Portal-Watch.com, a Web site that tracks the portal industry.

Since then Q-switched YAG lasers were used for a period as they provided a more focusable laser beam as well as increased pulsing frequencies capable of engraving the finer cell configuration demanded by the ever evolving flexographic printing process.

Since approximately the year 2000 the direct anilox laser engraving process has been dominated by the use of fibre lasers which provide the high powers of the carbondioxide lasers together with the finely focusable beam of the YAG lasers.

It is true it is weak in absolute terms, but not only is it accumulative, it is focusable, so that the magic inherent in a cubic kilometer of the planet can be brought to bear in concentrated form at a microscopically small point.

However, its properties make it useful for industrial processing as well; the beam is focusable and can be transferred by an optical fiber, as its wavelength is not absorbed much by fused silica but is well absorbed by metals, making it suitable for laser cutting and drilling.