[3dem] magnification question

[Zongli Li]

Hi David Gene,

The magnifications reported by a Talos Arctica user interface should be "
mag on the viewing screen" if the viewing screen is inserted, and will
change to " mag on the CCD" when viewing screen is extracted. But as Sacha
pointed out, what matters is really the calibrated mag on the whatever
camera you have used for calibration and data collection, and this mag will
not show up in the user interface, but stored in the magnification table in
Gatan GMS if you are using Gatan CCD/K2/K3 camera.

Best,

Zongli

On Tue, Jun 23, 2020 at 1:50 PM Morgan, David Gene <dagmorga at indiana.edu>
wrote:

> Hi,
>
>
>     Does anyone happen to know whether the magnifications reported by a
> Talos Artica are supposed to be "mag on the viewing screen" or "mag at the
> film plane"?  We clearly have a serious issue with the calibrated
> magnifications on our microscope, but I just recalibrated it and got more
> or less the same lousy magnifications.  I'm trying to understand our
> issues, and knowing what the microscope thinks it is reporting would be
> helpful.  Thanks in advance.
>
>
> --
>     politics is more difficult than physics.
>                                              A. Einstein
>
>             David Gene Morgan
>         Electron Microscopy Center
>              047E Simon Hall
>              IU Bloomington
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