On 13. Jun 2019, at 13:59, Grassucci, Robert <[log in to unmask]> wrote:

Our Polara has a Cs of 2.26 mm.  This was actually measured before it was installed but most twin lenses are said by Philips/FEI/Thermofisher  to have a Cs of 2.0 mm.

Bob

 

From: Collaborative Computational Project in Electron cryo-Microscopy [mailto:[log in to unmask]] On Behalf Of sunyeping
Sent: Wednesday, June 12, 2019 4:07 AM
To: [log in to unmask]
Subject: [ccpem] what is the spherical aberration of TF30 Polara electron microscope (FEI)

 

Dear everyone, 

 

I am trying to process microscophs data collected from TF30 Polara electron microscope with relion. The data is downloaded from EMPIAR. In the "CTF estimation" work type, the I/O tag interface require to input the  spherical aberration. Do you know what is the spherical aberration value of FEI TF30 Polara electron microscope?

 

Best regards

 

Yeping

 

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