Re: [DIYbio] Re: Anyone else want to take Intro to CRYO-EM class with me on Coursera?

On Tue, Aug 11, 2015 at 2:14 AM, Shubham Goyal <shubhamgoyal@nus.edu.sg> wrote:
> Hi,
>
> Thanks for this notice about the course :) I will also take it. If you want,
> we can work together. I do not like taking courses in isolation, I get
> distracted :-P
>
> Thanks.
>
> Warmest Regards,
> Shubham.

Great!

I got through about an hour of the course last night! I am now ready
to start watching "The Column".

So far, I am ready to ask whether the per-lens deflection correction
and the beam astigmatism correction utilize the same coils or not. It
seems for deflection, each opposite coil-pair potential would adjust
proportionally and oppositely (as one side increased in current, the
other would decrease)... but for astigmatism I think they'd be
adjusted independently or equally, but in the same direction (as one
side increases current, the other either stays the same, or also
increases). So in deflection the beam is shifted, but for astigmatism
the beam is squashed or broadened.

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