I was messing around with my 50mm f1.4 prime lens and took a bunch of shallow depth of field pics, here are my top picks:

ISO100 f3.5 1/1600 sec
Some pics of Kilala:

ISO100 f1.4 1/640 sec

ISO100 f1.4 1/160 sec

ISO100 f1.4 1/800 sec
And Luna:

ISO100 f1.4 1/50 sec

ISO100 f1.4 1/50 sec
All taken with my Canon Digital Rebel XTi
and a Canon EF 50mm f/1.4 USM lens
.