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Cazzo ma non siete capaci neanche di tradurre le notizie dall'inglese?
Specialist accessory manufacturer Metabones and optics company Caldwell Photographics have jointly announced the 'Speed Booster', a lens adapter for mounting SLR lenses on APS-C and Micro Four Thirds mirrorless cameras that reduces the focal length by a factor of 0.71x and increases the maximum aperture by 1 stop.
Fino a prova contraria moltiplicando per 0.71 la focale cambia, non resta equivalente.
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