On Mon, Aug 1, 2022 at 11:11 PM, Roland Christen wrote:

I have not yet settled on a flattener F-ratio. Something between F6 and F7 for larger format coverage and better resolution for small objects. depends somewhat on what users are looking for.

 

Roland

Personally, I'd opt for f7 or longer.  There just isnt enough difference between f6 and f5 for me to want both focal lengths.  Something that would be close to seeing limited for average skies would be compelling.  (For the sampling of modern CMOS cameras at 3.76um pixel size)