telekonvertrar

Telekonverter, also known as extenders or doublers, are optical devices that are attached between a camera body and a lens to increase the focal length of the lens. This effectively magnifies the image projected onto the camera's sensor, allowing for greater reach without requiring a physically longer lens. A 1.4x teleconverter, for instance, will multiply the lens's focal length by 1.4. A 2x teleconverter multiplies it by 2.

The primary advantage of using a teleconverter is the ability to achieve longer focal lengths at a significantly lower cost and smaller size compared to purchasing a dedicated telephoto lens. They are particularly useful for wildlife, sports, and other photography where getting close to the subject is difficult. However, teleconverters do come with trade-offs. The most significant is a reduction in the maximum aperture of the lens. A 1.4x teleconverter reduces the aperture by one stop, and a 2x teleconverter reduces it by two stops. This means less light reaches the sensor, potentially requiring slower shutter speeds or higher ISO settings, which can lead to increased noise. Additionally, image quality can sometimes be slightly degraded, with a potential for reduced sharpness and contrast, especially with lower-quality lenses or at the edges of the frame. Despite these drawbacks, teleconverters remain a popular and practical accessory for many photographers seeking to expand their lens's capabilities.