Additional information - I decided to take a loot at the CICLOPS Looking Ahead page and found this (see
http://www.ciclops.org/view/8451/Rev251-253):
QUOTE
After the Pandora observation, ISS will acquire a series of very high-resolution radial scans of the unlit side of Saturn's ring system. These will be the highest resolution, ISS ring observation to date. This observation will include images of the outer B ring and Cassini division, the middle A ring, and the outer A ring, including the Keeler Gap which is generated by the gravitational interaction between ring particles and the embedded small moon Daphnis.
I'm now pretty sure that the resolution of the above ring image is ~0.5 km/pixel.