Teleconverters offer increased focal length but often compromise image quality

Teleconverters are presented as a false economy in photography, despite their appeal for adding reach to existing lenses. While they can extend focal length, they typically reduce light, impact autofocus performance, and degrade sharpness. The author contends that the f-stop penalty alone makes them questionable, especially in non-ideal lighting. Modern advancements in super-telephoto zoom lenses offer greater flexibility and optical integrity, making them a more reliable investment than teleconverters, which introduce additional mechanical stress points and potential for equipment damage.