J2100f k2 preset design¶

Magnification:	Preset name:	Image Shift (x,y):	Dimension:	Binning:	Camera Dose (e/camera pixel/s):	Exposure Time (ms):	Specimen Dose Rate (e/A^2):	Spot Size:	Defocus (m):	C2 (um):	frame saving:
80	gr	Aligned	927x959	4	10	100	n/a	5	0.0	100	no
800	sq	Aligned	927x959	4	10	100	n/a	3	0.0	50	no
2500	hl	Aligned	927x959	4	10	400	0.008	4	-2e-5	50	no
2500	hc	Aligned	927x959	4	10	400	0.008	4	-2e-5	50	no
25000	fc	0,0	926x926	2	>=10*	400	8.8	4	-2.9e-7	50	no
25000	fm	0,0	n/a	n/a	high	n/a	high	4	n/a	50	no
25000	fa	0,0	927x959	4	>=10*	200	3.5	4	-1.5e-6	50	no
30000	ed	0,0	3710x3838	1	8 e/pixel/s and ~1.3 um on the specimen	5000	27	4	(-1e-6 to -2e-6)	50	200 ms/frame

Spot 5 on this scope is modified by JEOL engineers to reduce the beam intensity further from the original values so that it does not over dose K2 sensor.
The strong image shift hysteresis of the 800x square preset required us to use MSI application that has an extra step of centering the holes using 2500x mag. See Leginon_Operation for_JEM_scopes

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