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Glossary terms about Condenser lens

Condenser lens
An electromagnetic lens located just below the electron gun to focus the electron beam emitted by the filament

6 pages mention Condenser lens

Electromagnetic lenses, apertures and beam size
The condenser lens is at the top and the objective lens at the bottom. 
Magnetic lens system
The condenser lens controls the intensity of the electron beam reaching the specimen. 
Sample preparation
Scan rate and signal to noise ratios
Noise pulses are derived from such sources as beam brightness, condenser lens settings (spot size), and SE detector ‘gain’, and may impart a salt-and-pepper (grainy) appearance to the image. 
Spot size
Also, a higher current though the condenser lens (labelled spot size on the control panel or software) creates a smaller spot on the sample no matter what WD is used. 
What is an SEM (Parts of the machine)?