What is ISO in the camera

Each camera model has its own characteristics and capabilities. The term ISO or, simply speaking, photosensitivity is described in the instructions of each camera. To learn how to make high-quality artistic pictures, you need to figure it out in the assignment of this parameter and its configuration.

Instead of "ISO", the "light sensitivity of the matrix" is often said. In this name, the purpose of this parameter is revealed. Previously, photographers have changed the film, picking it up on the box indicated on the box 100, 200, ... in modern cameras, you can change the ISO value manually or automatically. The numbers mean the sensitivity of the matrix to the brightness of the light. The higher the ISO value is set, the stronger the matrix perceives the light and the pictures are brighter. Incomprehensible photo-terms See in terminov dictionary.

When it is necessary to raise the ISO value. With weak lighting, the camera cannot build a good exposure. You can use the flash, but it does not always solve the problem. When shooting in a darkened hall, for example, on a disco, at the concert, the photo list will not help. Snapshots will be clear if you set up quite high ISO. In addition, it makes it possible to reduce the shutter speed when shooting moving objects without a tripod.

Too much increase in photosensitivity can give a negative result, since it inevitably leads to the appearance of noise in the photo in the form of graininess throughout the frame. With an increase in ISO, the matrix perceives not only useful light, but also the smallest distortion, interference. The matrix itself is not perfect for all 100%, and the increase in sensitivity increases its error. Usually matrices are configured to transfer as little interference as possible with a small ISO. Most often it is ISO to 100.

The concepts of ISO and the size of the matrix are interconnected. The matrix size affects the quality of the pictures that are obtained when setting up ISO. If the matrix is \u200b\u200blarge, the pixels are also large, they are smaller on a small matrix. A large matrix perceives more light, and the noise in the pictures will be less. Two matrices on 2 megapixels of different sizes with the same ISO settings will give different picture quality.

Noises in the photo are a big problem of apparatuses with a small matrix. A better result can be achieved using a semi-professional camera. Compared to the "soapy" the size of the matrix is \u200b\u200bmore. The camera will be less and the snapshots will be cleaned, if the mirror has the number of megapixels will not be excessively large. Contrary to advertising, which reports - the more megapixels, the better, everything is good in moderation.

So that the noise becomes almost impaired, it is better to print snapshots small in size. If you use photoshop, then with it you can significantly reduce the grainy in the pictures. To achieve the best result for photoshop, you need to install special plugins, programs. Among the many existing programs can be allocated: Neat Image., Noise Ninja..

Sometimes the photographer stands before choosing what to do is to increase the value of ISO and get not a very clean photo or not to do it at all. Not all noises are equally poorly looking, in addition, they can be cleaned on the computer, so it is best not to refuse to make it possible, maybe a unique picture. School digital photography It will help you to figure out the difficult questions of photography.

The best photographs are obtained at low ISO. If the machine is configured to the ISO auto attribution, then switch to manual mode and check if it costs the minimum value. With weak lighting, use the flash or increase the photosensitivity. A good mirror (Sony or Canon) will delight quality and with ISO3200.