I'm considering a all purpose walk around lens, for those situations where changing would mean missing a shot. The lenses I'm considering are:
http://www.amazon.co.uk/Tamron-18-2...ie=UTF8&qid=1379683930&sr=8-2&keywords=18-200
http://www.amazon.co.uk/Sigma-18-25...L5A1OLE&s=photo&ie=UTF8&qid=1379858350&sr=1-5
http://www.amazon.co.uk/Sigma-18-20...5A1OLE&s=photo&ie=UTF8&qid=1379858350&sr=1-15
I want to avoid spending over £600 on the Nikon equivalent as I will only be using for the 'walk around' situations; I'll still be keeping and using my current lenses just as much.
http://www.amazon.co.uk/Tamron-18-2...ie=UTF8&qid=1379683930&sr=8-2&keywords=18-200
http://www.amazon.co.uk/Sigma-18-25...L5A1OLE&s=photo&ie=UTF8&qid=1379858350&sr=1-5
http://www.amazon.co.uk/Sigma-18-20...5A1OLE&s=photo&ie=UTF8&qid=1379858350&sr=1-15
I want to avoid spending over £600 on the Nikon equivalent as I will only be using for the 'walk around' situations; I'll still be keeping and using my current lenses just as much.