What does it mean for the aperture type to be set as Float By Stop Size, and why is there no field for entering a value?
What does it mean for the aperture type to be set as Float By Stop Size, and why is there no field for entering a value?
Best answer by Sarah.Grabowski
Float By Stop Size is one way to define the aperture of your system. It means that the system aperture is determined by the semi-diameter of the stop surface (regardlesss of its location), which is set by the user as the Clear Semi-Diameter value in the Lens Data Editor. This could be quite handy when dealing with a system where the stop surface is a real aperture with a pre-determined size located somewhere within the system. Since the entrance pupil diameter, image space F/#, object space NA, and aperture stop radius are all related, any one of these are equally valid ways to define the aperture of the system.
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