Pitkänobjektiviläpimittaiset

Pitkänobjektiviläpimittaiset, often translated as "long focal length lenses" or "telephoto lenses," refers to a category of photographic lenses characterized by their long focal lengths. These lenses magnify distant subjects, making them appear closer in the final image. This magnification is achieved by a design that creates a longer effective focal length relative to the physical size of the lens.

The primary use of pitkänobjektiviläpimittaiset is to capture subjects that are too far away to photograph with a standard lens. This includes wildlife photography, where it's essential to maintain a respectful distance from animals, and sports photography, where photographers need to frame action from the sidelines. They are also employed in portraiture to achieve a compressed perspective and to isolate the subject from a busy background.

Compared to wide-angle or standard lenses, telephoto lenses typically have a narrower field of view. This means they capture a smaller portion of the scene. The long focal length also tends to flatten the perspective, making foreground and background elements appear closer to each other than they are in reality. Achieving sharp images with pitkänobjektiviläpimittaiset often requires a tripod or image stabilization due to the magnified effect of camera shake.