ISO

Research Into ISO/ASA


Secondary Sources

The ISO of this photograph would be quite high, as the image is grainy, you can clearly see the noise in the image. However, the ISO used means that the image would be quite versatile, with poor lighting and conditions having less of an effect on the photo, as a higher ISO also makes the image lighter, making images able to be taken in darker conditions.

In this image a high ISO has been used, which can be seen through the noise on the image.     The image is also lighter than it would have been if a lower ISO was used, but the graininess of the image almost ruins the image, so perhaps it would have been better to use a lower ISO setting.

This photo uses a low ISO which results in deeply detailed images, as long as there are very good light conditions. In this image there is no grain, and it is very effective to get the  detail that you want in the landscape photo. As with aperture, this is very important in order to create an effective landscape image.

In this photo a low ISO setting has been used, which ensures the detail stays in the water and rocks. Also, a low ISO causes the images to become slightly darker, which is useful for an image such as this one where a long shutter speed has been used to blur the water, as a slow shutter speed lightens the image, so the darkness caused by the low ISO will help compensate.

Primary Sources

The following two photographs are taken in the same place, with about 30 seconds difference between the two shots. I did this to emphasise the difference that the ISO can make to a photograph.

For this image I used the lowest exposure available on my camera, which was 100. this ISO ensures a good 'quality', of photograph, with little grain. However, as the conditions I took the photo in were not ideal (indoors, in a shaded corner, with no lights on) the image appears dark, which overall subtracts from the success of the photo.

In this image I used the highest ISO available, which was 800 (I was using a compact camera at the time), and it very clearly shows the difference between the two ISO. The image appears lighter, which is ideal in the dark setting that I took the photo. However, the image is far more grainy than the first shot. At this ISO it is not too detrimental to the photograph, and also since the image wasn't intending to be a detailed shot, the grain does't ruin it.

This close up of the ISO 800 photo shows the grain in the photograph, causing the image to appear a little blurry and lose the quality.