Here is a comparison between two pics of the same sample: one in the standard SEM record mode, and one taken in active mode (bet which one was taken in active mode?) :

 

 

Here is another of 4 bitmaps that were taken from the same SEM, in nearly the same operating conditions (use left- and right arrow keys to navigate, ESC to quit) :

 

 

And here are miscellaneous images acquired from SEMs: