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Working distance WD:
The distance from the cover glass top surface to the nearest point of the
objective.
Numerical aperture NA:
The NA is a performance indicator. The higher NA, the higher the resolving
power.
It describes the ability of the lens to collect light under steep entry angles.
Resolution:
The ability to differentiate two points, or minimum distance under which
two points can be differentiated.
Focal depth:
The area along the optical axis where a focused image appears to be sharp.
If the aperture iris diaphragm is stopped down, the focal depth becomes
bigger. As greater the NA of an objective, as shorter the focal depth.
Field number:
A value that indicates the diameter of the image of the field diaphragm that
is formed by the lens in front of it in mm.
Field of view:
The actual size of the field of view in millimeters in the Eyepiece.
Total magnification:
Objective magnification multiplied by the eyepiece magnification.
Содержание Panthera C
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