ya 36mm is not wide enough for travelling. You will miss a lot of shots I think.
Quite a few of my travelling shots are 28mm and below. I don't really understand the rational for the 18-180mm...
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But 18mm at the wide side is kind of limited
Agreed and personally I prefer at least 24mm for wide angle shots. At the moment, I can live with my 14-54mm. Looking more at the tele range (and price).
Sometimes it so hard to decide what's the 1 for all lens purpose. Most important is to see what is your shooting habits. This would somehow help decide the type of lens to carry.
Now when I travel, 11-22, 14-54, 40-150 and EC14 are the lens I carry with me. I too was in the dilemma on the 18-180 or the 14-54 but the 14-54 helps cover the lower light situations that the 18-180 would not be able to. If you don't already own the 40-150 or the 14-45 or the 14-54, then 18-180 would be interesting. Couple that with the 11-22, you only carry 2 lens. add a EC14 or the new EC20, WOW. Your focal length would be 11--360 which is more than sufficient fro most needs.
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I think I like your lens combinations although I not too sure about the 11-22mm. But then again the 7-14mm is way way too expensive for me.
Anyway, thanks to all the inputs and I think the 40-150mm is probably the better choice in terms for pricing and needs for me.