+1 for
Stellarvue - My faithful high performing (3xApods) little SV70t will soon be on the market as it does not cover full frame.
However Vic re-engineered the entire line to now cover FF cameras.
The SVX objectives are completely, uniquely and individually hand-crafted and tested.
While the SV's can pass with a Strehl rating of .93-.97, the SVX's are optimized to .98 or better.
"The Bluester" here on IIS has the
SVX80 and it is an absolutely superb instrument. I want one!
https://www.astrobin.com/full/sgpqgv/0/