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Canon EF 70-300mm f/4-5.6 IS USM non mette a fuoco (al freddo)


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    4. » Canon EF 70-300mm f/4-5.6 IS USM non mette a fuoco (al freddo)





avatarjunior
sent on 25 Marzo 2021 (10:24)    

Ciao! Ho una Canon EOS 60d e spesso uso l'obbiettivo Canon EF 70-300mm f/4-5.6 IS USM assieme. Tutto funziona correttamente fino a che le mattine fredde invernali, dopo poco tempo di utilizzo, smette completamente di mettere a fuoco. Penso abbia a che fare con la temperatura perché in casa dopo essersi scaldato inizia a mettere a fuoco come prima. Questo problema e dell'obbiettivo in quanto il Sigma 50-500mm f/4-6.3 EX DG HSM sullo stesso corpo macchina non d'ha assolutamente problemi di alcun tipo nonostante sia stato utilizzato con le stesse condizioni climatiche.
Vi chiedo se sapete il motivo reale, cosa accade a livello tecnico all'obbiettivo, se si può risolvere e se si come...Grazie!!

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