Thanks, Slip,
I am way out of date here with M43.
I am looking at a small, but quality camera for someone else.
To check that lens roughly, I put the SMC Pentax 1:2.8 24mm on the Oly EPL1 and set f/2.8 to see the ability to discriminate subject from background, that she requests.
24mm is slightly tele, even so, f/2.8 is not really what she would require, I think:
Camera jpg s from the Oly
https://app.box.com/s/pximr9ersqpuxfw1alzbhnkrlg3oop5l https://app.box.com/s/v1omxjg9fc77wpwqj288u785r6hyirzd
---------- Post added 07-05-15 at 06:14 PM ----------
Continuing my crude tests,
Here is the Pentax Istds with the Pentax -M 1:2.8 40mm wide open, to check subject disrimination from background.
https://app.box.com/s/y4o3op8ffz35fk5ybhe0gjubclehvfq0 https://app.box.com/s/huql9gqs094xfqgdwjcb0tb2frozbco6
Discrimination is quite a bit better than the M43 in post 11.
However
I think the smallest Pentax aps-c camera that could do the needed job is the superseded K-R at body weight of 544 gram.
The current one is maybe the K-30 at 650 gram
These are a lot heftier than 6BQ5's Olympus OM-D E-M10 at 396 gram