focus control

focus control

[′fō·kəs kən‚trōl]
(electronics)
A control that adjusts spot size at the screen of a cathode-ray tube to give the sharpest possible image; it may vary the current through a focusing coil or change the position of a permanent magnet.
(optics)
A device to adjust a lens system to produce a sharp image.
References in periodicals archive ?
Both lenses feature three 20-pin connectors for zoom control, focus control and access to the virtual terminal, even in full servo setup with focus and zoom controllers connected.
8 maximum aperture is effective in low light situations and offers shallow depth of field focus control.
While lenses like Nikon's PC-E line are still useful for their original purpose perspective control--I've seen some absolutely brilliant portrait and wedding photography that uses tilt/shift capabilities as a dreamy focus control.
Features include hands-free activation, smooth dimming and focus control (1x flood and 4x spot) and lock-out function that prevents battery drain.
Independent Exposure and Focus Control in Camera App
In nineteen chapters and six appendices, Pressel and his collaborators test a lay reader's patience and comprehension with detailed explanations of the looper, twister, optical bars, platen assemblies, image motion compensation, focus control, servo-control systems, film characteristics, functionality testing, S-cubed sensor, and more.
Piezo-driven fast nanofocus devices not only provide nanometer-precise focus control, but .
The PIFOC family of piezo-driven fast nanofocus devices provide nanometer precision focus control and can be used in 3D imaging and Z-stack image acquisition due to their millisecond-range settling speed with travel ranges from 50 um to 2 mm.
WHO has strongly recommended that governments focus control and prevention efforts in surveillance for antimicrobial resistance; rational antibiotic use, including education of healthcare workers and the public in the appropriate use of antibiotics.
The H160ZFP Foot Pedal Remote Focus Control System provides a remote focusing solution for a wide variety of applications.
The organization has recommended that governments focus control and prevention efforts on surveillance, rational use, education of the public and health workers, and legislation to stop sales without a prescription.
lt;p>Plug-in Suite 5 includes full versions of the following plug-ins:<p>FocalPoint 2 - Promises to give photographers the best way to add the most realistic depth of field and selective focus control to any image after it is photographed.