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Focus & Depth of Field

4 terms

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Focus & Depth of Field

Magnification Ratio

The ratio between the size of a subject and the size of its image on the sensor.

m = image size / subject size ratio Focus & Depth of Field

Manual Focus

Focusing by turning the lens ring by hand while judging sharpness visually or by scale.

m Focus & Depth of Field

Microprism Collar

A ring of tiny prisms around a focusing screen's centre that shimmers when the image is out of focus and clears when it is sharp.

 Focus & Depth of Field

Minimum Focus Distance

The closest a subject can be to the sensor plane and still be brought into focus.

m