I just come back from 12 weeks in between Europe, Far East Asia and New Zealand. I took my K-7 with two lenses only:
- DA18-250mm and
- Voigtlander Nokton 58mm f1.4.
That is, I took an all-around lens that was on the K-7 most of the time. And a fast prime for low-light photography.
While traveling, the K-7 and DA18-250mm were in a small top-loader bag (with the battery charger, an adapter and the USB cable). I carried the fast prime Nokton 58mm f 1.4 in my backpack or in my pocket.
The lessons:
- that was the perfect combo for me; it worked great;
- the DA18-250mm is a sturdy lens and it gives great flexibility to 'reach' places where you cannot go;
- the Nokton 58mm is a superb lens and I got great shots; I found that it works also great in foggy/smoggy conditions and gave better contrast than the DA18-250mm in some 'tricky' situations;
- The K-7 is really a rugged camera; I am glad that it has WR;
- the top-loader bag (Lowepro TLZ1) was perfect;
- I had only one SD card but I backed up the data on my notebook computer every 2 days; if I did not have the computer for backup, I woud have taken 2 SD cards.
Hope that the comments will help....