Flats not removing dust motes?

[footbag]

Here is a link to a Dropbox folder with a light and flat as well as my master.  This is the R channel only.

https://www.dropbox.com/sh/2ya3sf4cbp56yah/AAADMRWXIx0eelqm_9GPKR8ya

[Alejandro Tombolini]

Hi Adam,
Dust motes are in different places in the Single_light_sub_R and the Master_Flat_R
That produce the incorrect calibration.
Don't know the cause..., all the big motes seems to be displaced to the left.
Saludos, Alejandro.

[footbag]

Thanks.  How did you compare them to see them moving? 

I believe you, I just can't figure out how to see it. 

Do you think the dust moved on the filters or so you think the filters didn't stop in the same place?  This has happened more then once and it happens no matter how well I take my flats. 

[georg.viehoever]

Maybe you can use the Blink tool.
Georg

[footbag]

Thanks!  They are moving. 

Now I have to figure out why.   

[pfile]

i have this problem with my STT+FW8G, but i think my worst offenders are in front of the filter wheel (on a reducer) and when i recently added a rotator… wow, those dust motes were moving all over the place. i guess i just need to take everything apart and clean it well.

rob