I picked up a Sony A7 late last year and have been using it for my walks with various lenses. So far I love it.
Purling Brook Falls at Springbrook:
Taken with an Alpa/Kern 50mm/1.8 Macro

Wait-a-while by CameronS884, on Flickr

Stinging Tree Beetles by CameronS884, on Flickr
Taken with Alpa/Schneider 135mm/3.5

DSC00508.jpg by CameronS884, on Flickr
Mt. Ngun Ngun:
Taken with Pentax Super-Takumar 28mm/3.5

DSC00998.jpg by CameronS884, on Flickr
Taken with the kit zoom

Mt. Ngun Ngun by CameronS884, on Flickr
Cedar Creek:
All taken with the kit zoom

DSC01277.jpg by CameronS884, on Flickr

Cedar Creek Cascade by CameronS884, on Flickr

DSC01262.jpg by CameronS884, on Flickr