Effect of Cs

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Up Level
Effect of Defocus
Effect of Cs
Effect of High Voltage
Envelope Functions
Point Resolution
Information Limit
Spatial Coherency

Smaller Cs gives a higher spatial resolution.



Philips Tecnai F20 T (Cs = 2 mm, Point resolution: 0.27 nm)


Philips Tecnai F20 ST (Cs = 1.2 mm, Point resolution: 0.24 nm)


Philips Tecnai F20 UT (Cs = 0.5 mm, Point resolution: 0.19 nm)