Magazine article from our research archive:
|
|
Expert tips on lenses: selecting properly, focusing accurately, and testing thoroughly will make for a perfect installation and a satisfied customer.
- Article from:
-
Security Distributing & Marketing
- Article date:
-
February 1, 2006
- Author:
-
|
Copyright informationCOPYRIGHT 2006 BNP Media. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
|
Although they are sometimes taken for granted, camera lenses are a critical element of video surveillance systems. Choosing the right lens and installing it properly can mean the difference between identifying and prosecuting a perpetrator, or between a happy and unhappy client--and with the wide range of lens choices available in today's market, the selection process often can be the most complicated part.
[ILLUSTRATION OMITTED]
DOME OR BOX CAMERAS
One of the reasons lenses sometimes are taken for granted is that many of today's video cameras, particularly today's increasingly popular dome cameras, come with a lens already built in. "A dome camera has the ...
Related newspaper, magazine, and journal articles:
|
Fujinon's Day/Night Vari-focal lenses.(Literature Showcase)
Security Distributing & Marketing;
September 1, 2004 ;
67 words
...Fujinon's three ground-breaking Day/Night Vari-focal lenses for the security market, the YV5x2.7R4B, YV2.7X2.9LR4A...fastest F-stop, widest angle of view, and broadest focal length of any competitive lens. [ILLUSTRATION OMITTED] For...
|
|
f-number
The Oxford American College Dictionary;
47 words
......n. Photography the ratio of the focal length of a camera lens to the diameter...shot (e.g., f8 , indicating that the focal length is eight times the diameter). ORIGIN...20th cent. : from f (denoting the focal length) and number .
|
|
Japanese Inventor Develops Finder Optical System for Single-Lens Reflex...
US Fed News Service, Including US State News;
July 2, 2008 ;
263 words
......than]-1.0 -0.45[less than]f3/f[less than]-0.25 where f1 is the focal length of the first lens; f1-2 is a combined focal length of the first and second lenses and is a focal length where a diopter is -1 m.sup.-1 when the focal length of the eyepiece...
|
|
focal length
A Dictionary of Physics;
18 words
...focal length The distance between the optical centre of a lens or pole of a spherical mirror and its principal focus .
|
|
Relate Object Dimensions to Lens Focal Lengths.(Brief Article)
Test & Measurement World;
December 1, 2000 ;
517 words
......the distance to the object, and the focal length of the lens you need. You can algebraically...X.L/f (Eq. 1) V = Y.L/f (Eq. 2) f = focal length of the lens (mm) H = horizontal dimension...fits the camera and that has a 25.6-mm focal length. Such a lens does not exist, but you...
|
|
|
Japanese Inventor Develops Camera System
US Fed News Service, Including US State News;
November 7, 2006 ;
265 words
......developed a camera system with flash control based on focal length. According to the U.S. Patent & Trademark Office: "When the focal length of a photographic lens is less than a first focal length, a dimming correction amount deltaY is set to...
|
|
|
Japanese Inventor Develops Zoom Lens
US Fed News Service, Including US State News;
February 9, 2007 ;
321 words
......Patent Office, said: "Zooming from a short focal length end to a long focal length end is performed by moving each of the lens...8focal length of the long focal length end, fw is the focal...
|
|
How to buy a lens: give your DSLR new powers without spending a...
Macworld;
July 1, 2008 ;
700+ words
......be familiar with a few basic concepts. Focal Length Technically speaking, a lens's focal length, represented in millimeters, is the distance...point. This matters to you because the focal length determines the lens's viewing angle. The...
|
|
Focal points.(camera lenses)
EMedia, The Digital Studio Magazine;
September 1, 2004 ;
700+ words
......LOOK A zoom lens works by changing the focal length, or distance, between the lens and the recording media. In order to zoom in, the focal length must be increased. To zoom out, it must...in the ratio represents the minimum focal length, the second number tells you its highest...
|
|
|
Japanese Inventor Develops Focal Length Measuring Device
US Fed News Service, Including US State News;
September 20, 2006 ;
300 words
......Mitsuru Namiki of Hanno, Japan, has developed a focal length measuring device for measuring a focal length of an optical system. According to the U.S. Patent & Trademark Office: "A focal length measuring device comprises a light source unit...
|
|
Compact Nikon 4x Zoom Lens Adds New Versatility for 35mm SLR Photo...
PR Newswire;
February 16, 1999 ;
586 words
......having a high quality zoom lens with a focal length range broad enough to cover diverse...action, nature and wildlife pictures. Few focal length ranges can boast such diversity. (Photo...at www.nikonusa.com. SPECIFICATIONS Focal length: 28mm to 105mm Maximum aperture: f/3...
|
|
Fiber collimating/coupling lens arrays. (New Products).
Fiberoptic Product News;
March 1, 2003 ;
140 words
......fused silica material. Their excellent focal length uniformity of < [+ or -] 0.45% lens-to-...and 1x16 channels and have a effective focal length of 720 [micro]m. Customized microlens...alignment marks, as well as pitch, focal length and throw distance. * Write In 371 or...
|
|
Fixed focal length lenses.(PRODUCTS)(Brief article)
Quality;
March 1, 2008 ;
167 words
......applications. The high-resolution fixed focal length lenses support sensors as large...millimeters wide for the 8.5-millimeter focal length lens (#58-000) and 155 millimeters for the 12-millimeter focal length lens (#58-001). The short focal...
|
|
|
U.S., Malaysian Inventors Develop Light Source with Variable Focal Length
US Fed News Service, Including US State News;
June 19, 2008 ;
235 words
......amp; Trademark Office: "A variable focal length light source is constructed using a...be adjusted in synchronization to the focal length of a camera lens. In one embodiment...light source to provide the tunable focal length required for a camera flash device...
|
See all results.
Or, try our
Advanced Search.
|