FocusMaster 120 FA 645 Lens

The minimum distance at which a camera lens can focus on an object while maintaining sharpness and clarity. It is expressed as a linear measurement (e.g., meters or centimeters) and indicates how close the subject can be to the sensor before the image becomes out of focus.

The distance from the optical center of a lens to its image plane when the lens is set at its working focus, expressed in a standard length unit such as millimetres or centimetres. It indicates the angle of view and zoom capability of an optical system and helps users compare lenses with different fixed focal lengths.

List of lens mount interfaces supported by a camera or lens, such as Canon EF, Nikon F, Sony E‑mount, Micro Four Thirds, etc. The value can be a single interface name or a comma‑separated list of multiple compatible mounts.

The aspect ratio describes the proportional relationship between the width and height of a lens’s image circle or sensor coverage, expressed as a simple fraction (e.g., 12/9). It indicates how wide or tall the captured image will be relative to its other dimension. This value helps users compare lenses for compatibility with camera sensors and desired framing.

The classification of a camera lens, indicating its optical design and intended use such as prime, zoom, wide‑angle, telephoto, macro or specialty types (e.g., fisheye, polarizing). It helps buyers understand the lens’s focal range, aperture characteristics, and typical shooting scenarios.

The ratio between the focal length and the maximum aperture of a macro lens, expressed as a simple fraction such as 1:2 or 1:4.5. It indicates how much magnification the lens can achieve relative to its size and is useful for photographers selecting lenses for close‑up work.

The highest f‑number (aperture value) that a camera lens can achieve when fully wide open. It indicates the maximum light‑gathering capability of the lens and is expressed as an integer or decimal without units.

The total count of openings, such as holes or ports, present in a product. This value indicates how many separate apertures are available for access, ventilation, or connection purposes.

Indicates the types of products, users or environments for which the item is intended or compatible. The value can be a single category such as "Gaming" or a specific product type like "Computer case".

The mass of the product expressed in a standard unit such as grams or kilograms. It represents how heavy the item is and can be used for shipping calculations, handling instructions, or consumer information.