What term describes the apertures that are 2 to 3 stops in from the extreme f/stops of a lens?

The term "sweet spots" refers to the apertures that are positioned 2 to 3 stops in from the extreme f/stops of a lens. This concept is significant in photography because the sweet spot of a lens typically offers the best balance of sharpness, contrast, and overall image quality. When a lens is used at its maximum or minimum aperture, it can often produce images that are less sharp or exhibit undesirable optical effects such as vignetting or aberrations. By using an aperture in the range of the sweet spot, photographers can achieve images that are both aesthetically pleasing and technically sound. This is particularly important for those who strive for high-quality results in their photography, as it allows for greater control over depth of field and exposure while maximizing lens performance.