Adjacent to the “Primera Junta” subway station, in the corner of Rivadavia and Barco Centenera, is the “Mercado Del Progreso“, a landmark in the neighbourhood of “Caballito”, one of the most traditional “barrios” of Buenos Aires. The Mercado has been a meeting point for Caballito regulars since its opening in 1889. Today, it retains much of the original charm of its metallic structure and its iconic central ceiling window.
In the morning hours of a regular weekday, Mercado Del Progreso is one of those ideal places for a photo shootout of urban activity in the midst of a historical site.
The selection below was taken with the Canon EOS 5D MarkIII and EF 16-35mm and EF 24-105mm zoom lenses. All six are high dynamic range (HDR) images, merged from 5 different original exposures using HDR Efex Pro 2 from the Nik plugin collection. They were further processed with the Color Efex Pro 4 module to enhance structure, and the Silver Efex Pro 2 for B&W conversion.
Scenes with very high dynamic range (containing very bright and very dark sections) are difficult to capture in a single shot without either blowing out the highlights or underexposing the shadows. Although common sensors in current DSLRs have 7 to 8 stops of dynamic range, many natural scenes would normally have a much greater dynamic range, too large to be captured accurately, even though they would look perfectly normal to our eyes. This is because each photoreceptor in the retina can adjust its gain independently (or almost independently) of each other, while an ISO setting in the camera applies equally to all pixels in the sensor. HDR imaging is a way to extend the dynamic range of a capture by taking sequential exposures of the same scene with bracketed settings. High-end DSLR cameras can do this automatically after dialing in the desired bracketing sequence and interval. Typically one shot is taken at the “correct” exposure indicated by the metring system, while additional shots are taken above (say +1, +2 or +3 EV) and below (say -1, -2 or -3 EV). The trick is to get all highlights and shadows correctly exposed in at least one of the exposures in the series. The images in the series are then combined to generate an HDR image using specialized software. Later editions of Adobe Photoshop can do this. Dedicated HDR software, such as Photomatix, is however easier to handle and yields very nice results.
Science, Jazz, Photography