Definition in pictures, the most improtant variable
We also know that is not the same between definition and detail if we take an image at a short distance in a macro so that if we took a photo to a farther distance with a telephoto lens
Definition (sharpness) describes the amount of detail in a photograph, is one of the most important variables in capturing the texture of the object. The picture definition is given by different parameters, these can be modified in a post-process or may be taken into account when shooting.
The traditional measure definition of image (sharpness) is stated in line pairs per millimeter abbreviated as lp/mm. In other words the ability of the human eye to discerned the number of high-contrast pairs of lines appearing in the space of a single millimeter.
One of the main parameters to consider is the sharpness (acutance), this describes the jump and the transition from one form to the next. So a sharp transition results in sharper images.
You may have read that some very high resolution B&W films can reach over 150 lp/mm. That’s amazing. Some really terrific lenses can actually resolve somewhat over 100 lp/mm. Wow.
On another important parameter is the resolution, it would certainly know that the higher the resolution, the greater is the definition that we can achieve.
The photographic equipment with which we will have a direct impact on our goal to capture the picture, the “acutance” of an image can be controlled by film ISO values by the focus that we make the object or with a post-process of the acquired image. The resolution and the camera is directly available and to a lesser extent the ISO value is used. Recall that a high ISO setting or exposure slow going to get a much higher grain and sharpness getting less precise resolutions.
We also know that is not the same between definition and detail if we take an image at a short distance in a macro so that if we took a photo to a farther distance with a telephoto lens. All this influences the final definition of the image. It is necessary to average each of these values to achieve the objective of our decision.
Tagged with: definition of images • film iso • high contrast • human eye • image sharpness • line pairs • millimeter • photographic equipment • photography concept • resolution • sharper images • telephoto lens • traditional measure
Filed under: Concept
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