[OM] lens grouping

[James Royall]

The massive zoom used by the motor racing photographer was described as 
having 13 elements in 18 groups. How would this work? Some kind of 
quantum effect operating so that an element is not part of a group 
until it is tested as being there, so could be in two groups at once?
Is there more to the element / group thing than meets the eye?

James


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