Diaphragm Discussion ( 9+inch vs 12inch )

Continue to check Diaphragm effect by using 12inch SCT to 9+inch (24cm: say 24SIM).
Here is Moon surface comparison on July06 2017 evening MA 11.4 ,seeing 4-level.

12 inch South Babbage, Robinson
                           

9+ Image as follow ,Schroters valley Aristurchus

Gussendi