I'm kinda newbie in this line. But I've had a Canon 400D for more than a year now, and only have been using the kit lens 18-55mm. I'm eager to buy a new set of lens, and adding to that i will be making an overseas trip next week. I'm torn between Canon 18-200mm and Sigma 18-200mm. The main reason i wanna get this lens is due to the hassle-free of bringing too many lens during travel.
However i've scout around and found the price difference between this two is around $400+, with Sigma being the more affordable one. I've read reviews that Sigma has 1 stop lesser than Canon, and the picture are found to be softer. But i'm not sure whether this minus points are worthy of my $400. I urgently need opinions from those who had or are using this two types of lenses.
Thank you all!