Cameras

They take pictures Take photos : )

It is possible to put a pinhole camera anywhere in the wall or ceiling, and the only way to find it would be to tear all the drywall out. If you don't find it after doing that, then most likely your parents have surgically embedded a device in your skull that is tracking your thoughts at this very second. Every time your ear itches, that is the device uploading its data to your parents' secret bedroom computer.

It is illegal to have cameras in the bathroom of any state by law. Depending on what kind of video camera you mean. A personal video camera in the bathroom is legal as long as you are not filming somebody dumping. That's just wrong. It's child pornography. Now, it is illegal to put video cameras in bathrooms for security reasons by US law. Washington may have a different law on that. Check the state site if this doesn't help.

The short focal length of a camera lens is so that the image the lens forms is small and can be focused on a piece of light-sensitive film.

Yes it can. Architecture as a form of art dates far back in time to the temples of the Greeks, pyramids of Egypt and the stepped pyramids in South America. Many of the new buildings being designed and built are very much art. Think of the Bird's Nest Stadium built in Chin for the Olympics.

Cameras were available using dry gelatine plates since the 1870s, but it was not till George Eastman who developed paper film in 1885, and then celluloid film, was the first simple camera produced. It was called the "Kodak", a simple box camera with a fixed lens.

his reason to make a camera was, because he thought that paintings often reflected the opinion of the painters.

However, photos showed exactly what happened. that's why.

Also, Eastman thought that most painters did not get every single detail. The camera did.

Certainly, as long as students know they are there.

yes the pinhole was the very first camera invented!

A pinhole camera is the most simple form of Photography and requires practically no knowledge of photography to build a pinhole camera and capture an image using it.

The basic principle behind a pinhole camera is the light enters through the pinhole at the front of the container (eg. a shoebox) travels through the light proof box and hits the photographic paper at the back of the box. The paper reacts to the light and where the light falls it is exposed (dark) and where there is no light the paper remains light. As you will be able to see after the image has been developed; the image produced will be a negative of the actual image. The image will also be upside-down due to the way in which the light enters the box.

Then all that remains is to develop the photographic paper as you would normally. You will not see anything until you start to develop the paper. The paper will still appear white.

Remember:

- Light only travels in straight lines,

- The box will need to be light proof apart from the pinhole at the front,

- The pinhole cannot be too small, it can quite easily be too large,

- Only place the paper in the box and remove it from the box in a darkroom.

- Anything can be turned into a pinhole camera! Even rooms...

Suggestions:

- An old shoebox works well, as does a film canister.

- Use black and white paper, it is easier to develop and far simpler to start with. Maybe experiment with colour afterwards.

- You will need to use trial and error to find the correct exposure time.

eg, if the image appears too dark decrease the exposure time, if it appears too light increase the exposure time.

Have fun, pinhole camera's are great to make and a good introduction into photography.

Alex Apps

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- the aperture should be about 1/100th of the distance to the image plane

visit http://en.wikipedia.org/wiki/Pinhole_camera for a fascinating story about the world's largest pinhole camera

Micron

The most common type of pinhole photography is done with the aid of a shoe box. The film (use real black and white film as it is less sensitive to light and light leaks because we are talking about a shoe box here) is taped to one end of a shoe box and a small pinhole is carefully punched into the center of the opposite end of the shoe box. The box lid should be placed on tightly and sealed in place. When you handle the film, you must try to have total darkness. Practice all aspects of putting your shoe box "Camera" together in the light first. Place your finger over the pin hole before bringing into the light. Then the box is placed, usually outside on a sunny day. Point the pinhole end of the box toward something that you are interested in taking a picture of. Your subject has to be something that is stationary. The light coming through the pinhole will expose your film for you. Research the subject to help determine pinhole size and approximate exposure times to take some guesswork out your project.

the camera was developed by Joseph Nicéphore Niépce in 1826. to capture instant moments in time.

All other things being equal, you will not notice a difference except for the larger file sizes for the same size of picture taken. If you aren't using the camera professionally, I suggest you concentrate more on features. These days, people seem more interested in big numbers (for pixel size) because it's the easiest thing to discuss around the water cooler. IMHO, anything over 6 MP is a waste unless you're getting a bargain.

If you have photographic memory then your eye functions like a camera in a way

Charged coupled devices appeared in the early 1970's and consist of an array of light sensitive cells arranged in a matrix etched on to a silicon chip. They were first used in astronomy applications in place of photographic plates that needed long exposure times of faint stars. They were very expensive arrays and the number of pixel elements was fairly small but,when coupled to a computer, were able to count photons and log them into a data set. This was not possible to do prior to this electronic photo plate. Kodak introduced the first digital camera in 1990 but I don't think it is possible to accurately tell what was the first. I would say a photo of a distant galaxy in about 1972 is a good guess.

A photograph is a two dimensional representation of a real-life scene. A hologram is three a dimensional representation.

I can only partially answer this, because in my view there are several factors.

1: In the camera you can set the resolution of the photo when it is taken. Stretching that photo to fit a certain print size will then result in a certain DPI. 2: You can resize a photo in an editor. But use caution, as there are different resize methods. Some result in better quality than others. It is possible to end with an image which says it has a high DPI value, but the content is actually low in pixels. So you have wasted file space and you still end up with larger pixels than necessary. And last, you can keep the file large and wait to scale it until you are ready to mail or print. At that time you should be able to select the dimensions in inches or cm.

I rarely pay attention to the actual DPI value becaue the result can be unpredictable and dissappointing. Instead, I prefer to stick with pixel dimensions and let the DPI adapt as it may.

Are you are trying to change to a smaller or larger format? What are you starting with and is it the screen size or printing size you are concerned about?

-srobidoux@verizon.net

You can't. The no of pixels a camera has is determined at its manufacture. To get more pixels you'd have to replace the actual plate at the bottom of the camera that catches the incoming light. And that's not doable outside a very specialized workshop.

A digital camera is a portable camera that runs on batteries and usually has a slot for a memory card to save pictures and videos to. They generally have better image quality, presently ranging from around 8-12 megapixels on average. This is what you usually see people carrying around for taking pictures. A webcam is a small camera that connects to a computer [or is built into a laptop] and is generally used for video chats online. They have lower quality than a digital camera.

Since the early 1990s, red light cameras have been used in the United States in 26 U.S. states and the District of Columbia. Within each state the cameras may only be permitted in certain areas.

For example, in New York State, the Vehicle and Traffic Law permits red light cameras only within cities with a population above 1 million. In Florida, a state law went into effect on July 1, 2010, which allows all municipalities in the state to use red light cameras on all state-owned right-of-ways and fine drivers who run red lights, with the aim of enforcing safe driving, according to then-Governor Charlie Crist. In addition to allowing the use of cameras, the law also standardizes driver fines. Major cities throughout the US that use red light cameras include Albuquerque, Atlanta, Austin, Baltimore, Baton Rouge, Chicago, Dallas, Denver, Los Angeles, Miami, New Orleans, New York City, Newark, Philadelphia, Phoenix, Raleigh, San Diego, San Francisco, Seattle,Toledo, OH and Washington, DC.

Some states have chosen to prohibit the use of red light cameras. These include Arkansas, Maine, Mississippi, Montana, Nevada, New Hampshire and West Virginia. As of December 2010 Arkansas, Nebraska, Mississippi, Nevada, New Jersey, Utah, West Virginia and Wisconsin have enacted various prohibitions on red light, speed or other photo enforcement camera uses. Restrictions or conditions exist in additional states; the New Mexico Department of Transportation, for example, has asserted the right to restrict or prohibit red light cameras. In states such as Wisconsin, the ban comes from decisions by the state supreme court declaring that type of device unconstitutional.

While red light cameras may not be prohibited in other regions, they may have some restrictions on their use. In some jurisdictions, the law says that the camera needs to obtain a photo of the driver's face in order for the citation issued for running the red light to be valid. This is the case in California, Arizona & Colorado where the red light cameras are set up to take a series of photographs, including one of the driver's face.