No other evidence, except only a note on the top of the diagram (attached), which appears to be the same/similar to images you supplied but from the whole page (??)
Also, as I mentioned earlier, my setup is C11 (SCT), and I haven't observed much difference between star images in corners of APS sensors when I varied the distance... definitely nothing similar to what diagrams suggest.
BTW.. in this post (link below), there is a link to
Telescope Optics website, where simulation of the C11+FR can be found.
At the time I was dealing with this, I had only Meade FR, which is slightly different in design to Celestron, but similar in performance.
I was thinking about putting those numbers into OSLO and play with simulation.. maybe soon.
https://www.iceinspace.com.au/forum/...4&postcount=37