Teste De Conhecimento Sobre Fotografia - Nível Básico

Explanation
O diafragma é o elemento presente na objetiva que controla a quantidade de luz que atinge o sensor da câmera. Ele consiste em uma série de lâminas que se abrem ou fecham para permitir a passagem de mais ou menos luz, dependendo da configuração selecionada pelo fotógrafo. Ao ajustar o diafragma, é possível controlar a profundidade de campo da imagem, ou seja, a área que estará em foco.

Explanation
The three factors that allow for a shallower depth of field are the aperture of the diaphragm, the focal distance, and the actual distance between the subject and the camera. These factors determine how much of the image will be in focus, with a wider aperture, shorter focal distance, and closer subject resulting in a narrower depth of field. The sensitivity ISO and shutter speed do not directly affect the depth of field.

Explanation
The correct answer is "Para medir a luz" (To measure the light). A fotometer is a device used to measure the intensity of light. It helps photographers determine the correct exposure settings for their photographs by measuring the amount of light available in a particular scene. By using a fotometer, photographers can ensure that their images are properly exposed, neither too bright nor too dark.

Explanation
The correct answer is the shutter speed. When trying to freeze a fast-moving object in a scene, the camera's shutter speed should be prioritized. A fast shutter speed will capture the subject in sharp detail, effectively freezing its motion.

Explanation
The minimum safe shutter speed to avoid blurry images is determined by the reciprocal of the focal length of the lens. In this case, the lens has a focal length of 55mm, so the minimum safe shutter speed would be 1/55 or 1/100. This means that using a shutter speed of 1/100 or faster would help prevent camera shake and ensure a sharp image.

Explanation
ISO refers to the sensitivity of the camera's image sensor to light. By increasing the ISO, the camera becomes more sensitive to light, allowing you to capture grain/noise in your photo. This can be useful in low light situations where you need to increase the exposure without using a longer shutter speed or wider aperture.

Explanation
The correct answer is Obturador. The shutter speed, controlled by the shutter, determines the length of time the camera's sensor is exposed to light. In long exposure photography, a slow shutter speed is used to capture motion blur or create light trails. Therefore, the shutter is the element that allows the photographer to use the long exposure technique.

Explanation
Para capturar rastros de movimento em uma cena, é correto afirmar que é necessário usar uma velocidade de obturação mais lenta. Isso ocorre porque uma velocidade de obturação mais lenta permite que o sensor da câmera registre o movimento ao longo do tempo, resultando em rastros ou borrões de movimento. Isso é especialmente útil ao fotografar objetos em movimento, como carros em uma estrada ou pessoas em movimento. Uma velocidade de obturação mais rápida, por outro lado, congelaria o movimento, resultando em uma imagem mais nítida e estática.

Explanation
The answer states that the larger the f/ number, the smaller the aperture and the less light passes through the lens. This is correct because the f/ number represents the ratio of the focal length to the diameter of the aperture. A larger f/ number means a smaller aperture diameter, resulting in less light being able to pass through the lens.