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Problemino A7-Canon 100mm macro


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    4. » Problemino A7-Canon 100mm macro





avatarjunior
sent on 08 Agosto 2015 (21:11)    

Salve,
accoppiando la sony a7 con il 100mm f2.8 macro di canon (con ovviamente adattatore) e mettendo a fuoco il piu vicino possibile (0.31 m)si riduce il diaframma. Si passa da 2.8 a 3.5 come fanno gli zoom con il minimo valore di daframma in relazione alla focale.

è risolvibile la cosa??
grazie

avatarsenior
sent on 09 Agosto 2015 (1:17)    

Non so spiegarti tecnicamente come ció avvenga, ma so per certo che è del tutto normale.

avatarjunior
sent on 09 Agosto 2015 (2:07)    

Semplicemente all'aumentare del rapporto diminuisce il diaframma e questo viene segnalato su tutte le fotocamere, tranne che su canon, per cui si, è totalmente normale

avatarjunior
sent on 09 Agosto 2015 (14:06)    

Ok grazie. In effetti sulla 5D non accadeva e sulla Sony l'ho notato subito .

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