What does image quality mean?

When talking about photography the term “image quality” also referred to as “IQ” is characteristic of an image that measures the perceived image degradation (typically, compared to an ideal or perfect image).

Factors that affect quality include the brightness and evenness of illumination, contrast, resolution, geometry, color fidelity and color siscrimination of an observed image. Achieving the highest possible image quality relies not only on using the best available equipment, but also making correct photographic choices. Correct use of exposure, lighting techniques, and post processing techniques all effect the overall quality of an image.

S / M / L / raw?

Image size is measured in pixels: (examples shown below)

Small - 2992x2000 (basic)

Medium - 4496x3000 (normal)

Large - 6000x4000 (fine)

(Approximate size when printed at 300 dpi.

Record photos in JPEG format. Compression increases and file size decreases as quality progresses from “large through medium to small”. In other words - you can shoot more images in small, but the file size is reduced and quality is affected.

Raw images takes up more space, but offers more options in post processing.

Information on camera settings such as exposure compensation, white balance, and picture controls are stored separately from the raw data from the image sensor and can later be modified as often as desired with with no deterioration in image quality.