enimmäisaukko

Enimmäisaukko, often translated as maximum aperture, refers to the widest opening a camera lens can achieve. This is indicated by the smallest f-number in the lens's aperture range, such as f/1.8 or f/2.8. A larger enimmäisaukko allows more light to enter the camera sensor, which is beneficial in low-light photography situations. This wider opening also creates a shallower depth of field, meaning that a smaller portion of the scene will be in sharp focus, resulting in a blurred background (bokeh). This effect is often desired for portrait photography to isolate the subject. Conversely, a smaller enimmäisaukko (larger f-number) restricts light and increases the depth of field, keeping more of the scene in focus. Different lenses have different enimmäisaukko values, and lenses with wider maximum apertures are typically more expensive due to the complex optical design required.

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