Walk around to me means-I dont want to change lenses while I stroll about with no set project in mind, ie get out for a walk with the camera as opposed to being geared up for an airshow or museum whatever. I have a 24-120 and a 70-200 VR11 plus others but my walk around is my Nikon 70-300mm VR. Its not too big or obtrusive and covers just about every eventuallity. The two snaps attached are nothing more than walk about shots, nothing special just taken for the sake of coming home from a walk around the village with something. But both were taken with the 70-300mm which copes with everything, OK I could have gone to a bit more trouble to get the close up sharper but did i need to change to a close up lens on walkabout? No!