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Cameras

Whether it's a photo of a new baby, a wedding or a day at the beach, cameras help us record and remember life's memories. Ask questions about the camera's history and function here.

6,430 Questions

What kind of CCTV camera is used in banks?

used varifocal box cameras.this for better in banks

Can CCTV systems be hacked?

It varies, most hacking happens when you use the default password (commonly used are admin as username and password). For a secure and somewhat hack-proof, change password every month and control who knows it. Avoid using it in a wireless network, keep it off the internet. If you want to remotely view it, don't use dns services, I recommend using VPN or any form of tunneling services.

What handphone has the highest mega pixel camera?

the nokia 808 pureview has the highest mega pixel camera which is 41 mega pixel

How does mm convert to lens magnification?

With 35 mm film cameras, the 35 mm refers to the film size, not to be confused with the lens size. A 50 mm lens is usually considered the normal or neutral size, with a magnification factor of one. A 50 mm lens has no magnification. So, as the size (millimeters) of the lens become larger, the magnification of the image becomes greater. A 100 mm lens gives 2 times magnification, and makes the subject appear 2 times closer and gives less viewing area; a 200 mm lens gives 4 times magnification, and so on.

A 25 mm lens would make the subject look farther away by a factor of 2 and give a wider viewing area. Fisheye lenses, usually about 8 to 15 mm, give a very wide view and negative magnification. The increased area appears as a distorted "fisheye" view.

Digital cameras have electronic image sensors which are usually smaller than the area of film exposed in a 35 mm camera, and lenses will have a different magnifing effect. It is not a problem, though, as the manufacturer almost always gives a calculation of the equivalence of the lens with the digital camera compared to a 35 mm film camera, and calculates the magnification of the lens of the digital camera.

What is the first camera?

The name "Camera" derives from the words "Camera Obscura," which means "dark chamber." The principle of the pinhole was understood as far back as Aristotle's day, but the first good description of a pinhole camera obscura dates to sometime early in the 11th century when the Arab scholar Hassan Ibn Hassan, otherwise known as Alhazen, described the effect of a projected image through a pinhole into a darkened room as a means of safely observing solar eclipses. The "chamber" eventually evolved into a portable box for use as an artist's sketching aid. A lens was attached to replace the pinhole for the first time in 1550. The first successful use of the camera for photographic purposes was in 1816, when a Frenchmen named Nicephore Niepce made negative images on sensitized paper, though he was not able to fix them to prevent further action of light. He had succeeded in making permanent fixed imaged in the camera by 1826, but the resulting image was more like a lithographic plate than a modern photograph. So as you can see, the camera has evolved in both purpose and form over many centuries.

Which document exhibits better quality one printer with 600 dpi or one printer with 1200 dpi Why?

1200 dpi because dpi stands for dot per inch, there for 1200 dpi gives 1200 dots per inch instead of 600 dpi only giving 600 dots per inch thus 1200 dpi gives a better resolution

Was Joseph Niepce married?

Yes, he married Agnes Romero during his military career.

What type of camera does Julia Margaret Cameron used?

She first had used a camera with a french "Jamin" lens ( with a f3.6 diaphragm and a focal lenght of 12 ) before using a camera with a "Dallmeyer Rapid Rectinilear" lens (with a f8 diaphragm and a focal lenght of 30).

Source :

Julia Margaret Cameron

Photo Poche

Actes Sud 2009

How care you make your pictures 840 x 840 pixels and 10MB or less?

Save you images as .png (a lossless compression algorithm). I have a tough time gettings files bigger than 1,7Mb from images that are 840 x 840 pixels but those are even as .bmp are not more than 2.0 Mb so I do not see how you can have a problem.

What is shuttering carpenter?

A person who is skilled working on concrete wall verticals (MOLD)and reinforcement and concrete poured between them.

What is a medium format digital camera?

There are several options out there when it comes to a good medium format digital camera but I especially like Fuji. I have always heard good things about Fuji and this is a link to one of there top products http://www.dannyburk.com/fuji_gx680iii.htm .

Are dome cameras toxic or corrosive?

"Some dome cameras are made with an anti-corrosive coating. Therefore, some would possibly corrode if they got wet. I couldn't find any information about toxicity. Because it is an electronic device, I would presume that there are some materials which could be toxic, if not disposed of properly."

Pelco provides what services to its customers?

Pelco provides security cameras and video surveillance for indoor and out door situations. They have premier video systems and equipment. They are located in California.

What need in society prompted the invention of airplanes?

A need for fast transportation and the ability to travel to locations previously not reachable by foot, car, and train prompted the invention of the airplane.

What are the basic type of camera?

the basic type of camera is what they call point and shoot

What is a good wide angle lens for the canon eos 600d?

There are many lens at many different prices and standards of quality. Buy the best you can afford. A canon EF 10-22mm f/3.5-4.5 for very good picture clarity

On average how much does a Fisheye camera cost?

The price of a Fisheye camera can vary greatly depending on the manufacturer and store or website it is purchased through. The average cost is approximately $79 but can be higher or lower.

When was The Camera Never Lies created?

The Camera Never Lies was created in 1987.

What is casing and surveillance?

casing is the observation of one place or an area where the criminals hide