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A comparison between the lateral and depth resolution of focused STEM beams for: a) an uncorrected 200 kV FEI Tecnai STEM and b) an aberration-corrected 300 kV FEI Titan. The intensity scale shows low intensity for blue and high intensity for red. The drastically reduced probe dimensions (both lateral and depth) of aberration-corrected STEM have important implications for electron tomography because the entire object may not be in focus.
