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Master Zoom entrance pupil distance?


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#1 Daniel Miler

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Posted 16 December 2014 - 01:32 PM

Hello geeks,

Ive been trying to no avail to find out whats the Master Zoom's entrance pupil location\ distance from sensor plane. Anybody has any Idea where to find this info? ARRI's website gave no answer...


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#2 Bill DiPietra

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Posted 16 December 2014 - 02:45 PM

Try e-mailing them directly.  They've always been very helpful.


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#3 Dom Jaeger

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Posted 16 December 2014 - 07:45 PM

The entrance pupil position will very likely shift depending on the focal length. Since entrance pupil specs for zooms are usually only given for a few reference focal lengths and the zoom markings on the barrel aren't all that precise anyway, for really accurate determination of the entrance pupil position you're better off measuring it directly with the lens set to the focal length required.
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