T-stop

EN: T-stop

Fotografie

see Stop
Tiffan edu Glossary

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Accuracy

T-stop

Like F-number, measures the diameter of the lens opening. T-stop factors in the loss of light through the glass lens elements.

Cel Mai folosit cuvant: lens | Domeniu Aplicare : Fotografie Analog | Caractere: 101 Cuvinte: 22 | Limba: Engleza | Sursa Kodak cine

77%

Accuracy

T-stop

Similar to an F-Stop, some lenses, particularly zoom lenses, will have f-stops on one side of the aperture ring and t-stops on the other. To differentiate the two, the t-stops will be red and the f-stops white. T-stops are used in place of f-stops for setting exposure. Lenses with a lot of glass elements will often lose a little bit of light. The t-stops are calibrated to the actual amount of light that is hitting the film, rather than arrived at mathematically, as is the case with f-stops. However, the f-stops are still relevant, because while the t-stop should be used to set the exposure, the resulting f-stop will indicate how much Depth of Field you have.

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