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t

T Stop (Transmission) este un indice (subunitar) care se refera la cantitatea de lumina care traverseaza un obiectiv si cade pe cadrul fotosensibil sau senzor. Termenul a fost introdus in cinematografie deoarece s-a constatat ca doua obiective, marcate de producator cu aceeasi luminozitate (F Stop) transmit diferit lumina, din cauza schemelor optice diferite (numar diferit de lentile, grupuri de lentile diferite). De exemplu, un obiectiv cu o schema mai simpla trebuie usor diafragmat pentru a avea aceeasi transmisivitate ca unul mai complex, dar de aceeasi luminozitate si deci, a produce grade identice de inegrire a peliculei.

Foto-Magazin

t

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Foto-Magazin

t

(which stands for Time ) - Shutter speed setting used for time exposures. The shutter opens when the release is pressed and closes when it is pressed again.
Photo Tips

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Foto-Magazin

t

Setting that holdsthe camera shuttle open until the shuttle dial is turned or release is press thesecond time. This setting differs from B (Bulb) that it usually is astand alone setting and never drains the battery power and thus ideal for reallylong time exposures.
mirglossary

t

Used for long time exposures. At the T setting, the shutter remains open until it is manually closed by rotating the shutter speed dial.
nikongrossary