Re: [ccp4bb] Fine Phi Slicing

2017-07-13 Thread Gerd Rosenbaum
Hi Fred, fine slicing does not alleviate the count RATE limitation of photon counting detectors because fine slicing does not reduce the instantaneous photon flux on the detector when you cross the diffraction maximum. Fine slicing does help if you push the maximum counts per pixel per frame

Re: [ccp4bb] weird diffraction pattern

2017-07-13 Thread Gerd Rosenbaum
ith best wishes, Gerard. -- On Thu, Jul 13, 2017 at 01:25:08PM -0500, Gerd Rosenbaum wrote: Dear Gerard, you sound like a sales person for Dectris. Fine slicing is perfectly fine with CCD detectors - it takes a bit longer because of the step scan instead of continuous scan. The read

Re: [ccp4bb] weird diffraction pattern

2017-07-13 Thread Gerd Rosenbaum
Dear Gerard, you sound like a sales person for Dectris. Fine slicing is perfectly fine with CCD detectors - it takes a bit longer because of the step scan instead of continuous scan. The read noise issue is often overstated compared to the sample induced scatter background. If for fine slicing

Re: [ccp4bb] 5th Banff Meeting on Structural Dynamics, 18/19th Febr. - 22nd February 2017

2016-11-25 Thread Gerd Rosenbaum
Very good point, Eddie. The exclusion of females starts already with the Program Committee. Gerd Rosenbaum On 25.11.2016 10:48, Edward Snell wrote: ​This looks like a very interesting scientific meeting but I would just like to point out an observation based on the current invited speakers

Re: [ccp4bb] XDS INP

2015-05-12 Thread Gerd Rosenbaum
Hi Clemens, your suggested description of positive rotation doesn't remove the ambiguity. My intuitive way to define positive rotation (in 1994 or so, when building the SBC) was: Looking onto the sample, rotation of the sample in mathematically positive direction Only later I was told th