Leginon

h1. 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#Special-MSI-Application-designed-to-avoid-using-LOWMAG-sq-preset-in-the-target-adjustment]]