Artistic Photography: Getting black background daylight

Material used and exposure data (exif data):

Camera: Canon EOS 350D

Objective: Canon EF 100mm 1:2.8 USM MacroApertura the diaphragm: f/16Velocidad shooting (exposure time): 1 / 200 sec (maximum for this flash) ISO: 100 (the minimum for this camera) Flash (the characteristic of the camera) shot. I used a piece of white paper as a diffuser taped on flash.Modo manual exposure (M) Fired RAWEnfoque format (MF) UV Protective Filter

Composition:

A simple composition, respecting the "rule of thirds". The pepper placed on the right and the vertical branch occupying the left side of the photograph to not leave too much black space devoid of interest.

Exposure values:

Pepper was so close, I needed to close the diaphragm to get most or all appear focused (but you need some focus on the stick that holds it). For this reason I chose an aperture of f/16.

From here I was selecting the other values ​​were given 12 noon and wanted to get a black background.

To get a black background we have to do is to force the camera to capture anything not natural light (sunlight) and light with artificial light (flash) what we want it to appear illuminated.

First things first, ignore the time part of a picture flash.Lograr eliminating natural light is simple. Just close the aperture (in this case f/16) and decrease the exposure time. Making a picture underexposed, black, without light. this case perhaps the diaphragm to f/16 and ISO 100, a correct value (to achieve a photograph properly illuminated with natural light) for the exposure time would be 1 / 2 seconds or even a little más.Entonces we do, we put a short exposure time, in this case 1 / 200 seconds and check out a picture we almost black, extremely underexposed, eliminating natural light.

The lighting

The flash is fired at a fraction of a second (1 / 500, 1 / 1000 or something like that) and therefore affects only the exposure during that split second illuminating everything at your fingertips. I mean, if we illuminate an eccentric with a flash, even though we are exposing 30 seconds, the flash will only affect those 30 seconds during the split second when fired, the rest of the time the camera will capture natural light only.

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