UL: 0.84X .... UR: 0.92X
LL: 1.33X ..... LR: 2.40X
LR: 36~90mm helicoid extended, also vignette

Reverse mounted case, small magnification is not
so useable, it has to be 3~5X magnification IMHO.
Practically reverse mounting is unuseable for me.

Reversed Ultra-Micro-Nikkor 55/2 is better than the above
but I have not tested much. Will do it someday...