A) Objectives Are Used In Pairs For Stereoscopic Effects.
B) Each Objective Has The Same Working Distance Above The Specimen.
C) Each Objective Is Positioned To Be In Focus At The Same Stage Height.
D) Sequential Objectives Increase Power By A Factor Of Two." />

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Electron Microscopist Interview Question:

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"Parfocal" refers to microscopes with multiple objectives where:
A) objectives are used in pairs for stereoscopic effects.
B) each objective has the same working distance above the specimen.
C) each objective is positioned to be in focus at the same stage height.
D) sequential objectives increase power by a factor of two.

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C) each objective is positioned to be in focus at the same stage height.
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