I normally use a Canon DSLR but am now looking for a lightweight camera for use on longer walks which is still capable of producing good quality landscape images. I have used an Olympus E-420 with its lightweight 14-42mm kit lens but have been disappointed with the results, which lack sharpness. Upgrading to a higher quality lens would increase the weight significantly.

I am wondering what quality is achievable with compact or hybrid cameras for landscapes, and am considering the Canon G11, Panasonic LX3, Leica D-Lux 4 or the Panasonic hybrids. Can anyone offer any advice?