The meaning of lens Iris Fixed is as follows:

Iris: A mechanical adjustable aperture within the camera lens. It controls the amount of light passing through by adjusting the aperture size, thereby regulating the lens’s f-stop.

Fixed: In lens terminology, if combined with Iris, it usually refers to a fixed aperture lens, that is, a lens with an unadjustable aperture size. This lens has a simple design and low cost, and is suitable for scenes with relatively stable lighting conditions.

Features of fixed aperture lens:

Features of Iris Fixed lenses: The aperture size is fixed when the lens is designed, and the amount of light entering cannot be adjusted according to the shooting environment.

Low cost: Due to its simple structure, the price of fixed aperture lenses is usually lower than that of variable aperture lenses.

Applicable scenarios: Suitable for scenes with stable lighting conditions, such as indoor monitoring, shooting under fixed lighting environments, etc.Recommended Reading:What lens has the least distortion?

Comparison with variable aperture lens:

Variable aperture lens: The aperture size can be adjusted to adapt to different light conditions, but the cost is higher and the structure is more complex.

Fixed aperture lens: The aperture size is fixed and the cost is lower, but it needs to rely on external light conditions or auxiliary lighting.