By Andrew Kelly

When the first cameras appeared they were large bulky items available only to the few who could afford them and understand the science of photography. To take a simple photograph you needed to understand both the mechanics of the gadget, some mathematics and a sound understanding of chemistry. Over the years the camera was developed into something which could be more accessible to ordinary folk. Eventually cameras became tiny little boxes which even children could operate but using film meant that once the photo had been taken it was necessary to have the film developed by a photo lab before we could see the results. These days we have the digital camera and there is no longer the need to send off film and most folk don't even print our their photo's but are they easy to understand?

If you have been investigating buying a digital camera you will be aware of the multitude of camera manufacturers out there today. Well known camera producers, such as Nikon and Canon now compete against companies usually associated with other electronic items and a huge number of small companies producing digital cameras a knock down prices. Which company do you choose and is that digital camera bargain such a deal after all or are you paying far too much for old technology repackaged?

When buying a digital camera there are a few things to get to grips with. Most people are aware of the word megapixel but do you understand interpolation? These two words are incredibly important as two ten megapixel cameras are not equal if one interpolates the image. Interpolation is a digital way in which to increase the size of an image so a 5 mp camera can interpolate the image up to the equivalent of a 10mp one.

Another term which can confuse some is zoom. Basically there are two types of zoom, digital and optical and understanding them will help you pick up a digital camera bargain.

Ignore the mention of digital zoom on the packaging of a digital camera because the greater the amount of digital zoom the worse the photo. The reason for this is simple, digital zoom involves little more than removing the parts outside the zoom area and then enlarging the remainder. Nearly everyone understands that the more you enlarge a photo the more blocky it becomes and this, basically, is what happens in the world of digital zoom.

On the other hand, optical zoom, is something of importance. Optical zoom does not have an effect on the quality of your photo. Therefore you can zoom in and your image will still be as good quality as before. The greater the optical zoom the better the camera. However not all optical zoom is equal as the quality of the lens can vary between cameras.

The quality of the lens is one of the most important factors to consider when buying a digital cameral. Those tiny cameras for a $100 are not going to produce photo's of the same quality of those taken with a camera where the lens alone can cost several thousand dollars. Generally the higher the price of the lens the better the quality of the resulting image.

Knowing how you will be using your camera is incredibly important when deciding what to buy. If you will be taking your camera everywhere with you taking snaps wherever you can, mainly of friends and the likes, then a simple compact digital camera will be the best buy for you. In such cases the buying of an expensive DSLR with a lens with huge optical zoom would simply be a waste of money.

If you plan to take professional photo's then forget the compact as you have no option but to buy a DSLR. In such cases you will need to buy lenses which are suitable for you purposes but there is simply no room here to cover this huge topic.

Personally I use a professional Canon DSLR and a superb Canon PowerShot A480 for quick snaps. I think the A480 is fantastic for the price and suitable for all manner of photography. It only has a 3.3x optical zoom but this is ok for most situations. When comparing cameras look at the specifications carefully and always read reviews before making your final decision.

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