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Forum: Pentax Medium Format
03-04-2019, 08:56 AM
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Bonjour,
This has probably been asked before and I have searched on the Internet ... but, I am not certain of the calculation.
I have been recently putting my 67 lenses on the 645 (film) via a K&F Concept adapter (see images below). My question is what is the "equivalent focal length" in 35mm (135) when I do this ... I understand that a 67 lens on my 6x7 is halved and the ratio of about 0.625 applies to the 645 (film, not digital).
That's in advance for your input and "Salut", J
Pentax 645 with SMC Tak67 105/2.5
 120 Film - Chilvert cemetery - n° 2 by Jean Poitiers, on Flickr
 120 Film - Chilvert cemetery - n° 3 by Jean Poitiers, on Flickr
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