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Bokeh describes the aesthetic quality of the blur produced in the out-of-focus parts of an image. It's an important artistic element for creating pleasing backgrounds and drawing focus to the subject.

Aperture refers to the opening of a lens's diaphragm through which light passes. It's important in photography for controlling the amount of light reaching the sensor, and it affects the depth of field of an image.

Metering is the camera's system for measuring the brightness of the subject or scene to determine the correct exposure. It's significant in helping photographers to set the ideal aperture, shutter speed, and ISO settings.

The Rule of Thirds is a composition rule in photography that divides the frame into a 3x3 grid. Placing subjects along these lines or intersections can create a more engaging composition.

Chromatic Aberration is a color distortion occurring when a lens fails to bring all wavelengths of color to the same focal plane. It is important to correct for professional-quality photographs, especially along high-contrast edges.

RAW is a file format that captures all image data recorded by the sensor when taking a photo. It is vital for allowing extensive post-processing, as it contains more information than compressed formats.

Autofocus (AF) is a system within the camera that automatically adjusts the camera lens to bring the subject into clear focus. It's important for ensuring sharp images, especially in fast-moving or spontaneous situations.

Vignetting is the reduction of an image's brightness or saturation at the periphery compared to the center. It can be used intentionally for artistic effect or minimized for even exposure across the image.

The Exposure Triangle is a concept that combines aperture, shutter speed, and ISO to achieve a balanced exposure in photography. Understanding it is fundamental for controlling light and capturing quality images.

Focal Length, usually measured in millimeters, is the distance between the lens and the image sensor when focused on a subject. It's crucial for determining magnification and the angle of view of a photograph.

High Dynamic Range (HDR) is a technique that combines multiple photographs taken at different exposures to create an image with greater dynamic range. It's impactful in scenes with high contrast, revealing more detail in shadows and highlights.

White Balance is an adjustment to ensure colors are rendered accurately in different lighting conditions. It's significant in photography for avoiding color casts and maintaining color fidelity.

ISO measures the sensitivity of the camera's sensor to light. It's essential for determining exposure, especially in low-light conditions, but higher ISOs can lead to increased noise in images.

Dynamic Range is the range of light levels a camera can capture, from the darkest shadows to the brightest highlights. It's crucial for capturing images that accurately reflect the scene's contrasts without loss of detail.

Shutter Speed is the length of time the camera's shutter is open, exposing light onto the camera sensor. It's crucial for capturing images without blur and controlling exposure levels.

Depth of Field (DoF) is the range of distance within a photo that appears acceptably sharp. It is controlled by aperture, lens focal length, and distance from the subject, and is important for guiding viewer focus in a composition.

Noise refers to the visual distortion in a photograph, often seen as grain or speckles, particularly in areas of uniform color. It's an important aspect to manage for maintaining image quality, especially in low light or at high ISO settings.