  We use a Lucky Imaging system to obtain I-band images with much improved
angular resolution on a ground-based 2.5m telescope. We present results from a
10-night assessment campaign on the 2.56m Nordic Optical Telescope and quantify
the performance of our system in seeings better than 1.0''. In good seeing we
have acquired near diffraction-limited images; in poorer seeing the angular
resolution has been routinely improved by factors of 2.5-4. The system can use
guide stars as faint as I=16 with full performance and its useful field of view
is consistently larger than 40" diameter. The technique shows promise for a
number of science programmes, both galactic (eg. binary candidates, brown
dwarfs, globular cluster cores) and extragalactic (eg. quasar host galaxies,
damped Lyman-alpha absorbers).
