Entrance Pupil Database

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Revision as of 19:55, 9 March 2005 by 202.156.2.130 (talk) (Entrance Pupil Database)
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It would be good to have everyone enter there values for their entrance pupils for lens and camera combinations.

I have been doing some searching on the web, and found a lot of people saying they want to start to create a database of some kind, but have not seen anything substantial so far (correct me if I am wrong)

I think we need to have a common way of measuring it. I would suggest to use the distance from the middle of the tripod mount to the entrance pupil measure in x,y and z in milimeter (mm)

z = distance between the the middle of the tripod mount to the centre of the lens (0 if the tripod mount is over the centre of the lens) This should only be dependent on the camera body

x = distance between the middle of the tripod mount to the plane of the entrance pupil

y = distance between the middle of the tripod mount to the plane of the middle of the lens 

Camera       Lens      Focal Length         x     y     z
------------ --------- ------------------ ----- ----- -----
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