Mini Digital Camera Zoom Specifications

You probably have heard of people telling you information on camera zoom specifications, but most people have at best a fuzzy idea on what exactly makes the difference in camera zoom.

Consumers are so caught up with these specifications that manufacturers focus on highlighting these measurements and putting them into numbers for comparison between models and brands. But unfortunately, that’s probably as much as what most consumers know about these specifications. However, numbers are half the truth, but they don't always tell the full story. These numbers are simply marketing tools for the manufacturers rather than real, informed figures.

When comparing zoom specifications between digital cameras, manufacturers tend to list them with a number with an ‘X’. For example, 3X, 5X, 10X. A larger number means a higher magnification capability of the camera. But both the optical and digital zoom measurements are listed as the same number but there is a very real difference between the two.

An optical zoom gives you real magnification through the movement of the camera lenses while a digital zoom is simply a magnification of the file image without increasing the resolution of the picture taken. Most picture viewing programs on your computer have similar digital zoom functions. Needless to say, a digital zoom is next to useless for any self respecting photographer. A manufacturer with better optical zoom might harp on its optical zoom capabilities while a lesser camera might try to mask its lack of optical zoom by reporting a combined zoom figure.

Furthermore, one camera with 10X optical zoom is not necessary the same as another with also 10X optical zoom. This is because 10X refers to 10 times the magnification of the smallest magnification measurement of the camera. A camera with minimum magnification at 35 mm would have a 350 mm measurement at 10X zoom, but a camera with a minimum magnification at 28 mm would only have 280 mm measurement at 10X zoom. To find out about the actual zoom capability of the camera, you will need to read the fine details of the camera’s specification. The zoom range should be listed in a format similar to "35mm film equivalent: 28mm-280mm”.

Even if a camera specifically mentions optical zoom, not all optical zoom are equally good. Optical zoom is effected by moving the lens position within the camera. Some digital cameras are designed for smooth zoom, so you can stop at any point along the entire length of the lens position for any possible zoom. Others are designed with discrete stops for the lens movement, usually limiting to between four and seven zoom positions. Depending on how much of an expert photographer you may be, you might find the discrete zooms easier to handle but restricting your creativity or angle.

Although choosing a mini digital camera with a large optical zoom lens is the preferred choice for most users, people should understand that there are also minor drawbacks with increased optical zoom.

A high optical zoom can result in ‘noise’ in images when the lens is extended to its maximum zoom capability. The digital images do not record correctly in some pixels, resulting to failed pixels appearing on the photo. When stretching the zoom to its maximum, the lines towards the middle of the frame can appear slightly curved and the picture becomes somewhat distorted. This is known as pin-cushioning and it is common seen in cheaper, beginner-level cameras with large zoom lenses.

A high optical zoom magnifies an image and also magnifies any small movement of the hand and that will cause the photo to turn out blurry. Large optical zoom also results in slower shutter response time, especially when using the maximum camera zoom. Together with the magnification of movements, many users find it very difficult to take a clear picture even though they supposedly purchased a high grade camera. Usually pictures have to be taken with flash (which reduces the shutter response time) to take a clear picture.

Now that you understand what camera zoom is all about, the next time you shop for a camera, you can look straight for the optical zoom number, other descriptions like combined zoom or digital zoom mean nothing for you. Understand the actual zoom you actually might need and get a mini digital camera that gives you the same range of magnification. There’s no reason to pay more for higher zoom if you’re not going to be using them either.