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Old December 13th, 2013, 02:36 PM
Jerome Marot Jerome Marot is offline
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Join Date: Jan 2011
Location: Munich, Germany.
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Originally Posted by Bart_van_der_Wolf View Post
The last/rear lens is a strongly negative element. It needs to be there if the exit pupil is close to the sensor/film to cover the sensor with its image circle. It also reduces the apparent size of the exit pupil.
I would need to check, but I think that a strong negative element at the rear is the mark of a more telecentric lens, i.e. just what we want. In a telecentric lens, the exit pupil is reported far away from the sensor, i.e. its apparent size is very small.
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