Kiinteäpolttoväliobjektiivit

Kiinteäpolttoväliobjektiivit, often referred to as prime lenses in English, are a fundamental type of photographic lens. Unlike zoom lenses, which offer a variable focal length, prime lenses have a single, fixed focal length. This means their magnification and field of view remain constant, and the photographer must physically move to adjust the framing of the image.

The fixed focal length design often allows for simpler construction compared to zoom lenses. This simplicity can contribute to several advantages. Prime lenses are frequently characterized by their wider maximum apertures, meaning they can gather more light. This is beneficial for shooting in low-light conditions and for achieving a shallow depth of field, which effectively isolates the subject from the background with pleasing blur (bokeh).

Furthermore, prime lenses are often sharper and exhibit fewer optical aberrations such as distortion and chromatic aberration than their zoom counterparts, especially when comparing lenses of similar price points. This optical superiority is a significant reason why many professional photographers and enthusiasts favor prime lenses for specific applications where image quality is paramount. Common focal lengths for prime lenses include wide-angle (e.g., 24mm, 35mm), standard (e.g., 50mm), and telephoto (e.g., 85mm, 135mm), each suited for different photographic genres like landscape, portraiture, or street photography.