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Calcolo rapporto di ingrandimento/riproduzione

Forum
Obiettivi
Teleobiettivi

Frankbio

sent on 08 Febbraio 2015 (18:36)

E' possibile calcolare il rapporto di ingrandimento di un obiettivo? per esempio se ho un obbiettivo 300 mm con rapporto ingrandimento 1:4=0,25 a cui aggiungo un moltiplicatore 1,4 che rapporto potrei ottenere contando che la distanza di fuoco minima non viene modificata.

Guidoalpino

sent on 08 Febbraio 2015 (22:10)

Siccome la focale aumenta del 40% e la minima distanza di MAF non cambia, direi che aumenta del 40% anche il RR, quindi nel tuo caso diventa 0.35.

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