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Tag Archive | "camera"

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The Latest Features in Camcorders Today

Posted on 02 September 2013 by yizhan

At one time, the camcorder was considered as a bit of a status symbol. It was a high end piece of technology that enabled people to make their own home movies, albeit at considerable cost. In an age where cameras still relied on 30 picture films, the camcorder was seen as something that could capture fond memories on an entirely different level.

But now times have changed. These days, even fairly basic mobile phones are capable of capturing home videos, not to mention it being a feature on almost every digital camera available. High end mobile phones and cameras are even capable of recording video in high definition, so it’s easy to see why the reputation of the camcorder has taken a bit of a hit in recent years. After all, in the past they tended to be bulky, with short battery life, and in recent years they have been easily surpassed in far more portable technology.

The truth is, however, the video camera has evolved too. If you are looking for the best gadget used for recording videos, then you really need to think about looking at a camcorder to do the job. For a start, new camcorders boast a far superior battery life to those seen in high end mobile phones (which have been virtually reduced to land lines for the amount of times they need to be plugged in to charge!). Then there are other features which are seldom found in smartphones, including optical zoom (not to be confused with the vastly inferior digital zoom), far larger storage options, as well as a multitude of other custom functions including manual focus and exposure adjustment.

These features can arguably be found in digital cameras too, but digital cameras don’t have the form factor that a camcorder does for taking video, making them awkward to use effectively – especially if you’re recording for a long period of time. There are also pocket video cameras available which eliminate the need for a bulky item to carry. Additionally, more camcorders are becoming available with the option to instantly share clips via social media networks such as Facebook and YouTube, and don’t forget that a camcorder also incorporates support for microphones too, which you won’t get with a camera (or a smartphone without some serious tinkering).

So whilst your camera or smartphone can offer great option for taking quick videos, with the prices much lower than they previously were, a camcorder is still arguably the best option if you have a larger videoing project in mind.

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Sony Atrac-Table

Posted on 16 May 2010 by yizhan

Looks like Microsoft Surface got a competition. This coming June, Sony is about to release  their latest interactive touch-screen device that was developed by AtracSys and Sony as well, the Atrac-Trable.  Well most of its feature is really much like of the Microsoft Surface but with added ability. I have only seen this tech stuff in the movie like the Minority Report and Iron Man, well  i think this time its for real.

The sony Atrac-Table is a 35inches wide multi touch-screen HD display and controllable by gestures, and equipped with two two built-in Sony ISS XCD-V60 cameras which detects motion and project the 3D object. Same as the Microsoft Surface, it also has the ability to interact what ever digital object placed over it. Much more, Sony claims that it can also determine your gender, your age, and even your emotion.  Imagine a device that can see or determine our emotion,  cool isn’t it?

Price is not available yet, but for this kind of tech stuff that really shows a big change in our technology today I think it would not be far from Microsoft Surface starting price of $12,500 or maybe higher for its additional capabilities. Well lets just wait..

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Basic Principles of a Camera

Posted on 18 April 2010 by yizhan

Camera, a device used in photography.  All Camera has four fundamental parts:  The body, a light-tight box that  serves as a rigid framework on which all other parts are mounted and also serve to protect the film from exposure to light, except in the process of taking the photograph.  The body is mostly composed of hard plastic and light metal.

Next is  the lens , which is the one responsible for gathering image.  It is mounted in front of the camera body focusing the rays of the light from the object.  In some camera lens, it is in a form of a plastic or glass and in more elaborate camera, its lens is consist of several piece of glass mounted in a cylinder called the lens barrel.  The lens has its light gathering power and it is indicated by the f-numbers or relative aperture, which is usually marked on the lens barrel.  Lenses with low f-numbers have relatively high light-gathering power and are called the fast lenses, while lens with high f-numbers have low light-gathering power and called the slow lenses.   The light-gathering power of most camera lenses are controlled by means of a diaphragm.  In many cameras the amount of light thats strikes the film can be controlled by opening or closing the diaphragm.  The diaphragm resembles the iris of an eye.  When the diaphragm is widely open, it allows a maximum light to pass into it.  When partially closed, it reduces the amount of light that pass into it.  Since closing the diaphragm reduces the light-gathering power of the lens, it has the effect of slowing the lens and thus increasing its f-number.

The Shutter, it is usually mounted behind the lens or between the elements of a complex lens.  Shutter that are mounted lens elements are called between-the-lens shutter while those mounted immediately in front of the film are called focal-plane shutter.  Most shutter incorporate a timing mechanism that makes it possible to vary the length of an exposure.  When set at a high speed such as 1/500 of a second, the shutter admits relatively little light.  For a low speed of 1/5 of a second, the shutter is open 100 times as long and admits about 100 times as much light.   High shutter speed are particularly useful for producing picture of sharp moving objects.

And finally the Film Holder. It holds the film in place at the back of the camera.  It is design to hold the film flat so that the image produced by the lens will be sharp over the whole picture area.  In most roll-film cameras the film compartment is place in to the back of the camera and a spring mounted pressure plate place in the back cover of the camera this pressure plate keeps the film flat across the picture area opening.

In its history, the photographic camera was developed from the camera obscura, a device describe earlier than 1039 by the Arabian Scholar Alhazen.  It consisted of a darkened room with a hole in one wall which light coming from the scene outside formed an image on the opposite wall.  For centuries however, there was no method of recording the image produced, other than drawing it.

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