Then you just came back in the camera store with all the information about why you need more megapixels for your camera. Its current has 8.1 megapixel compact camera and the seller says that you need to upgrade to the new model of 10.1 megapixels to really improve your images. Garbage! Here's why you don't need.
Because digital cameras are usually classified by their number of megapixels, the camera megapixel rating is often used as a measure of image quality. This is a concept totally wrong and a myth. There are a number of factors that determine the quality of a camera and megapixels is really an insignificant part. 10.1 megapixels on a 10.1 megapixel compact camera cheap and in a digital SLR guy and poles apart. As a comparison that mean nothing. If they meant nothing because their is a big difference in price. The price difference between a compact and an SLR should immediately tell them that there are other factors to be considered.
Here is what really matters:
1. camera lens Quality
It costs too much money to build a quality lens with high quality glass. If the camera is cheap means that the lens is cheap. Even if it had 36 megapixel image quality will be medium. Camera manufacturers cannot put quality glass on a camera of low quality. Even with digital SLRs have interchangeable lenses, the difference between entry level lenses and lenses pro is huge and measured in thousands of dollars.
2. build quality camera
The parts that go into a good quality digital camera construction cost much money to develop and, therefore, the camera will cost more. The cost difference between the plastic or aluminum and magnesium alloys of high quality is very large. This is even more with digital SLRs. When comparing the way a shutter button or dial sits on an entry level for an SLR pro you will feel a huge difference which again reflected in the price.
3. the quality of the sensor
How to deal with its light sensor and the resultant noise is dependent on the quality and compilation of CMOS or CCD sensor and its ISO classification. Try taking a picture with lots of shade and you'll see that there are stain color and a look more grainy in darker parts of the image. This is the noise. The more expensive cameras will have much less noise or sometimes without noises at all compared to compact cameras cheaper. This degrades the quality of an image even with a good lens.
4. the quality of the processor
Each camera has a computer chip called the processor that takes digital information received through the sensor and renders it in an image. The way this is processed affects the speed and overall image quality. The most powerful and complex processor the best image quality and of course the higher the cost of the camera. Again the more megapixels are processed by a processor of low quality will continue to give a picture of low quality.
It is so easy to use an aspect of a camera to judge the quality of the camera, and this is what the manufacturers and sales people have made. It is much easier than explaining a number of additional factors, but it makes the explanation of a myth. Need to almost quadruple the megapixel camera sensor to make an obvious improvement. Even just doubling the megapixels will only give you a subtle increase in quality. And this again will really play a role only if all other quality factors are also increased.
So how do you know what to buy? The answer is forums and review sites. Go check out what reviewers have to say and then read the forums and listen to what people who bought the camera that you are interested in words.
Use your natural instincts and you will know when a sales person is pulling the wool over the eyes. No manufacturer can afford to sell high quality for low prices. This is why many digital SLR manufacturers sell you a kit lens with the camera and not a high-quality, to save costs.
So the bottom line, use their instincts. When someone wants to sell you a BMW or Mercedes for a price of Suzuki alarm bells should start ringing.
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Wayne Turner has taught photography there are 25 years and is the author of three books on photography.
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