How to Select the Best Lens Focal Length for your ...
Selecting the best lens for your security camera is an important aspect of a video surveillance system that assures sufficient area is covered while still maintaining adequate detail of the subject. If you choose a wide angle lens (say 3.6 mm) ... [... more]
eHow |
How to Use the Barlow Lens With the Sky-Watcher SK707AZ2 ...
The Barlow Lens, named after Peter Barlow (1776-1862), a professor of mathematics at the Royal Military Academy at Woolwich, England, is an additional device that enhances the focal length of a telescope. The greater the focal length, the better ... [... more]
eHow |
How to Use the Barlow Lens With the Sky-Watcher ...
The Barlow Lens, named after Peter Barlow, professor of mathematics at the Royal Military Academy of Woolwich, is a device that enhances the focal length of the Sky-Watcher telescope. The main advantage of the Barlow Lens is that it provides ... [... more]
eHow |
How to Choose the Right Camera Lens
By simply changing a lens, the scope of a potential image changes, too. Understanding the difference between lenses will help you get the best shot. Opt for a telephoto lens (a lens with a focal length greater than 55 mm) to bring your subject ... [... more]
eHow |
How to Calculate the Magnification of a Sky-Watcher SK ...
You determine the magnification power of a telescope from the focal length of the eyepiece and the focal length of the telescope. The eyepiece in the Sky-Watcher SK MAK series is either 10 mm or 25 mm; the telescope ranges from 1250 to 1500 ... [... more]
eHow |
How to Use Camera Focal Length
The creative process of photography begins during a shoot. By playing with the various options on your camera (shutter speed, aperture, etc.), you can manipulate your view of the world around you to create interesting and unique images. The ... [... more]
eHow |
Format: 1/3", Focal Length: 2.9-8mm, Iris Range : ...
Format: 1/3", Focal Length: 2.9-8mm, Iris Range : F0.95-T360 , Iris: Manual [... more]
$82.61
BrickHouse Security |
How to Assemble the Sky-Watcher SKMAK90SP ...
The Sky-Watcher SKMAK90SP Maksutov-Cassegrain Spotting Scope is a powerful device with a focal length of 1250mm. Assembling this spotting scope is considered easy. The entire assembling procedure can be broadly divided into three steps: attaching ... [... more]
eHow |
Format: 1", Focal Length: 25mm, Iris Range : F1.4-F22 , ...
Format: 1", Focal Length: 25mm, Iris Range : F1.4-F22 , Iris: Manual [... more]
$337.82
BrickHouse Security |
Mitsubishi OL-XD2000FR Fixed Focal Length Rear Lens - ...
 Mitsubishi OL-XD2000FR Fixed Focal Length Rear Lens - 11.5mm - f/2.4 [... more]
$1942.99 (Save 28%)
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Format: 1/2", Focal Length: 4.5-10mm, Iris Range : ...
Format: 1/2", Focal Length: 4.5-10mm, Iris Range : F1.5-T360 , Iris: Manual [... more]
$113.81
BrickHouse Security |
Format: 1/2", Focal Length: 6mm, Iris Range : F1.2-F16 , ...
Format: 1/2", Focal Length: 6mm, Iris Range : F1.2-F16 , Iris: Manual [... more]
$168.91
BrickHouse Security |
