NOISE
Sometimes being in cloudy weather, the photographers we are forced to use a high ISO is the time to be problems of noise in fotos.El noise is a kind of grain is most noticeable in dark areas of the image.
When we were at the time of the reels and films they were made with a minuscule silver grain which was more or less large, this grain size is affected by the light it gave the ISO number. So if you would buy a roll of ISO 100 the grain size was smaller and larger size ISO 400. This grain is affected by light and less light against Tuvieramos because we had to buy a reel with higher ISO.
The problem is that by revealing the photos, which had used a high ISO, the particles of silver to be bigger and looked more gave a grainy effect to the image.
In the digital age instead of the dust are tiny light sensors called photosites which are equivalent to one pixel, those who do that role. Dependieno sensor and camera these photosites work better or worse and ISO number as well as more use will be most affected those pixels.
Then I put an example of how to fix a program that will film me, the "Noiseware community edition", there are many others but I shot this.
You see, if you do clik on image to enlarge it, the noise is very noticeable in dark areas as there is lack of light and I shot with a iso 1600 for having too little light, from 800 the noise is much appreciated but also depends on the cameras.
In this picture you can see the noise especially around the royal shield of the blue areas but in the next we have eliminated.
Within Noiseware community can use the total or partial according to the image need not be significantly affected and sometimes a total suppression can make you lose focus and look very pastel image. Generally
a professional camera can have an ISO range of 100 to 3600 or more. But from 800 noise is quite noticeable. Ideally, if utilizais compact cameras the ISO is in automatic mode, the camera based on light that has governed the ISO but if we want to change it, we can play with the ISO and then more fully able to adjust both the aperture and speed of shutter.
But this is already for those who want to get out of auto mode.
expect to resolve a problem that you may arise in photos that we had to use a high ISO
