HDR photography

High dynamic range - a technique in photography involving the execution of several exposures of the same frame, some of which are underexposed, overexposed and the remainder. It allows you to obtain a picture of the scene is characterized by a large tonal range. 
Using this technique, usually done three to five photographs (sometimes more - depending on the tonal range and dynamics of the camera frame) with a properly illuminated shadows and indirect light elements, such as the difference between 2 EV (can be 1 or even 3), then combines the images into one file. In order to obtain the source photography, the method bracketing or produces a RAW file with different parameters. 
HDR composite image is subjected to the mapping of luminance, so that compression is a global contrast of the image, but are observed local changes in brightness. This technique can also be used to improve the quality of individual photographs, and noise, which in this case usually is enhanced, can be removed using a bilateral filter. 
For the first time this technique was used in 1857 by Gustave Le Gray, on the one hand trying to photograph both the sea and the sky, although it exceeded the technical capabilities of contemporary cameras and films. Le Gray solved the problem by doing two separate images with different exposure time, and then used the different parts of the negatives to obtain a positive.

Chromatic aberration

Chromatic aberration is a feature of the optical lens or to the differentfocusing distances (due to the different values of refractive index) for the differentspectral colors of light (different wavelengths of light). The result is a splitting of the lightthat is visible at the borders of contrasting areas in the form of color borders. Chromatic aberration is also present in the human eye lens, causing the coloredborders (orange and blue) around dark objects against a light background. In the caseof optical systems (telescopes, photographic lenses, etc.) is a defect in the deteriorating quality of reproduction. This phenomenon is also known in the black and white photography. There are nowhat's true colors, but the chromatic aberration causes blurring of the image. Correctioncan be achieved by apochromat or by use of an appropriate color filter with a narrowband of bandwidth or by the individual channels to convert color to black and whitechannel. Some of these methods require, however, increase the exposure time.

Pictorialism

Pictorialism is a trend in artistic photography which was developed before 1890 in England. It is based on the individual artist's interference in each print made by him, namely the break with the mechanical positive process. Instead of recording a photographic snapshot, a synthetic work of art is created. In photography, the artist uses fine art techniques such as: rubber, oil, and embossing. Photographs often resemble a pictorial image, drawing or graphic.

The Labyrinth of Looks. Documentary Photography in Latin America

An exhibition and publishing project of the Spanish Agency for International Development Cooperation, AECI, and Catalunya America House, which now joins theMinistry of Culture presented for the first time in Spain.

According exitmail account, the project consists of three exhibitions that have traveledfor nearly three years for 18 countries in Latin by the hand of the Network of CulturalCenters of Spain AECI, presenting differing viewpoints of authors working in the documentary field in Latin America, Spain and Portugal, committed to issues of socialcontent.

Available until 15 May in the Old Building Tabacalera in c / Embajadores, 53, Madrid.

Picture of a ghost?

Photo taken by the user, the mobile phone. - Only when viewing photos on your computer, I noticed that there is a figure of a girl, whom nobody has seen - says Internet surfer.

Wedding Photography

The most important thing for me as a photographer is to be as close as possible events.Do not interfere in their course, I'm an observer, which stops those fleeting moments in a long time afterwards, when the pass. For me, each wedding has its own unique atmosphere, which is composed primarily ofthe main characters, but also a place where the ceremony itself takes place. I try to make my photographs reflects the unique climate.

Slide

Slide is a positive image obtained directly on the film negative format. Characterized by high quality reproduction of reality and a very high color saturation. Prior to the digital recording technology, the reality was the main carrier of the image used for printing. Significantly surpassed its negative quality materials. Slides are still used as the primary medium of communication such as diaporamie.
Currently, the importance of expanded use of computer techniques in data communications, in modern graphic presentation as a basic element of presentation and computer animation including flash technology. It is equivalent to a single frame in the movie.
The presentation consists of a sequence of slides containing text, images, lists of questions, diagrams and charts, audio and video. Is displayed on the screen by the time defined previously by the author of the show, or, depending on their immediate needs (manual change slide). A slide shown during the "live" show is the basis of the verbal commentary of the speaker, which extends the issues outlined in the slide.
In some environments (eg, academics) was determined by that date and a special film on which the various elements drawn in, and then displays them on screen using epidiascope diaskopu or as an aid in the presentation of the topic.